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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2020	Apr. 24, 2020
Document and Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Registrant Name	ENZON PHARMACEUTICALS, INC.
Entity Central Index Key	0000727510
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Trading Symbol	ENZN
Entity Common Stock, Shares Outstanding		44,214,603
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 5,144	$ 5,446
Refundable tax credits receivable, current portion	970	485
Other current assets	123	62
Total current assets	6,237	5,993
Refundable tax credits receivable, net of current portion	0	485
Total assets	6,237	6,478
Current liabilities:
Accounts payable	322	324
Accrued expenses and other current liabilities	102	99
Total current liabilities	424	423
Commitments and contingencies
Stockholders' equity:
Preferred stock - $0.01 par value, authorized 3,000,000 shares; no shares issued and outstanding at March 31, 2020 and December 31, 2019
Common stock - $0.01 par value, authorized 170,000,000 shares; issued and outstanding 44,214,603 shares at March 31, 2020 and December 31, 2019	442	442
Additional paid-in capital	75,690	75,690
Accumulated deficit	(70,319)	(70,077)
Total stockholders' equity	5,813	6,055
Total liabilities and stockholders' equity	$ 6,237	$ 6,478

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
CONDENSED CONSOLIDATED BALANCE SHEETS
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000	170,000,000
Common stock, shares issued	44,214,603	44,214,603
Common stock, shares outstanding	44,214,603	44,214,603

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Royalties, net	$ 2	$ (51)
Total revenues	2	(51)
Operating expenses:
General and administrative	242	318
Total operating expenses	242	318
Operating loss and loss before income tax expense	(240)	(369)
Income tax expense	2	2
Net loss	$ (242)	$ (371)
Loss per common share
Basic	$ (0.01)	$ (0.01)
Diluted	$ (0.01)	$ (0.01)
Weighted-average number of shares - basic	44,215	44,215
Weighted-average number of shares - diluted	44,215	44,215

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2018	$ 442,000	$ 83,649,000	$ (69,098,000)	$ 14,993,000
Balance (in shares) at Dec. 31, 2018	44,215
Net loss	$ 0	0	(371,000)	(371,000)
Common stock dividend	0	(2,653,000)		(2,653,000)
Balance at Mar. 31, 2019	$ 442,000	80,996,000	(69,469,000)	11,969,000
Balance (in shares) at Mar. 31, 2019	44,215
Balance at Dec. 31, 2019	$ 442,000	75,690,000	(70,077,000)	6,055,000
Balance (in shares) at Dec. 31, 2019	44,215
Net loss	$ 0	0	(242,000)	(242,000)
Balance at Mar. 31, 2020	$ 442,000	$ 75,690,000	$ (70,319,000)	$ 5,813,000
Balance (in shares) at Mar. 31, 2020	44,215

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (242)	$ (371)
Adjustments to reconcile net loss to net cash used in operating activities:
Changes in operating assets and liabilities	(60)	82
Net cash used in operating activities	(302)	(289)
Cash flows from financing activities:
Common stock dividends		(2,653)
Net cash used in financing activities		(2,653)
Net decrease in cash	(302)	(2,942)
Cash at beginning of period	5,446	6,500
Cash at end of period	$ 5,144	$ 3,558

Description of Business	3 Months Ended
Description of Business	Mar. 31, 2020
Description of Business
Description of Business	(1) Description of Business Enzon Pharmaceuticals, Inc. (together with its subsidiaries, “Enzon” or the “Company,” “we” or “us”), manages its sources of royalty revenues from existing licensing arrangements with other companies primarily related to sales of certain drug products that utilize Enzon’s proprietary technology. Prior to 2017, the primary source of the Company’s royalty revenues was derived from sales of PegIntron, which is marketed by Merck & Co., Inc. (“Merck”). The Company currently has no clinical operations and limited corporate operations. The Company has no intention of resuming any clinical development activities or acquiring new sources of royalty revenues. In the first quarter of 2020, net royalties from PegIntron were $1,752. In the first quarter of 2019, net royalties from PegIntron were negative $51,000, due to returns and rebates exceeding the amount of royalties earned. At December 31, 2019, as asserted by Merck, the Company had a liability to Merck of approximately $324,000, due primarily to product returns and rebates. With the net royalties earned in the first quarter of 2020, this amount decreased to approximately $322,000 at March 31, 2020. See Note 12 to the Condensed Consolidated Financial Statements. In April 2013, the Company announced that it intended to distribute excess cash, expected to arise from ongoing royalty revenues, in the form of periodic dividends to stockholders. (See Note 7 to the Condensed Consolidated Financial Statements) On February 4, 2016, the Company’s Board adopted a Plan of Liquidation and Dissolution (the “Plan of Liquidation and Dissolution”), the implementation of which has been postponed. (See Note 11 to the Condensed Consolidated Financial Statements) On January 30, 2019, the Company entered into a letter agreement with Servier, a wholly owned indirect subsidiary of Les Laboratoires Servier, in connection with the asset purchase agreement dated as of November 9, 2009 (the "Asset Purchase Agreement"), by and between Klee Pharmaceuticals, Inc., Defiante Farmacêutica, S.A. ("Defiante") and Sigma-Tau, on the one hand, and the Company, on the other hand. Under the letter agreement, Servier, as successor-in-interest to Defiante, confirmed its obligation to pay the Company a $7.0 million milestone payment related to SC Oncaspar as a result of the FDA's December 20, 2018 approval of calaspargase pegol - mknl (brand name ASPARLAS(TM)) as a component of a multi-agent chemotherapeutic regimen for the treatment of acute lymphoblastic leukemia in pediatric and young adult patients age 1 month to 21 years. In addition, under the letter agreement, the Company agreed to waive Servier's obligations to pursue the development of SC Oncaspar in Europe and the approval of SC Oncaspar by the European Medicines Agency ("EMEA") under the Asset Purchase Agreement, provided that the Company did not waive Servier's obligation to make any applicable milestone payment to the Company upon EMEA approval, if any, of SC Oncaspar. Servier was required to make the $7.0 million milestone payment to the Company within three business days following the parties' completion of procedures for claiming benefits under the double tax treaty between the United States and the United Kingdom. That amount was recorded by the Company as a current receivable at March 31, 2019. The Company received the $7.0 million payment in July 2019. The Company has a marketing agreement with Micromet AG (“Micromet”), now part of Amgen, Inc. (the “Micromet Marketing Agreement”), that was entered into in 2004 under which Micromet is the exclusive marketer of the parties’ combined intellectual property portfolio in the field of single-chain antibody technology. Under the Micromet Marketing Agreement, the parties agreed to share, on an equal basis, in any licensing fees, milestone payments and royalty revenue received by Micromet in connection with any licenses of the patents within the portfolio by Micromet to any third party during the term of the collaboration. To the Company’s knowledge, Micromet has a license agreement with Viventia Biotech (Barbados) Inc. (“Viventia”), now part of Sesen Bio, Inc. (“Sesen”), that was entered into in 2005, under which Micromet granted Viventia nonexclusive rights, with certain sublicense rights, for know-how and patents allowing exploitation of certain single chain antibody products, which patents cover some key aspects of Vicinium, one of Sesen’s drug candidates that is in Phase 3 clinical trials being evaluated for the treatment of patients with non-muscle invasive bladder cancer and in Phase 1 and 2 clinical trials for the treatment of head and neck cancer. To the Company’s knowledge, under the terms of this license agreement between Micromet and Viventia, Micromet is entitled to receive (i) certain milestone payments with respect to the filing of a new drug application for Vicinium with the FDA or the filing of a marketing approval application for Vicinium with the EMEA; (ii) certain milestone payments with respect to the first commercial sale of Vicinium in the U.S. or Europe and (iii) certain royalties on net sales for ten years from the first commercial sale of Vicinium on a country by country basis. Pursuant to the Micromet Marketing Agreement, the Company would be entitled to a 50% share of these milestone payments and royalties received by Micromet. Due to the challenges associated with developing and obtaining approval for drug products, there is substantial uncertainty whether any of these milestones will be achieved. The Company also has no control over the time, resources and effort that Sesen may devote to its programs and limited access to information regarding or resulting from such programs. Accordingly, there can be no assurance that the Company will receive any of the milestone or royalty payments under the Micromet Marketing Agreement. The Company will not recognize revenue until all revenue recognition requirements are met. The Company maintains its principal executive offices at 20 Commerce Drive, Suite 135, Cranford, New Jersey, 07016 through a lease agreement for space and services with Regus Management Group, LLC (“Regus”) and also has an office facility at 3556 Main Street, Manchester, VT, 05225 pursuant to an office rental agreement with Equinox Junior, LLC (“Equinox”). See Note 10 to the Condensed Consolidated Financial Statements.

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2020
Basis of Presentation
Basis of Presentation	(2) Basis of Presentation Interim Financial Statements The accompanying unaudited condensed consolidated financial statements have been prepared from the books and records of the Company in accordance with United States generally accepted accounting principles (U.S. GAAP) for interim financial information and Rule 10‑01 of Regulation S-X promulgated by the U.S. Securities and Exchange Commission (the “SEC”). Accordingly, these financial statements do not include all of the information and footnotes required for complete annual financial statements. Interim results are not necessarily indicative of the results that may be expected for the full year. Interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2019. Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated as part of the consolidation. Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. These estimates include legal and contractual contingencies and income taxes. Although management bases its estimates on historical experience, relevant current information and various other assumptions that are believed to be reasonable under the circumstances, actual results could differ from these estimates. Revenue Recognition Royalty revenues from the Company’s agreements with third parties are recognized when the Company can reasonably determine the amounts earned. In most cases, this will be upon notification from the third-party licensee, which is typically during the quarter following the quarter in which the sales occurred. The Company does not participate in the selling or marketing of products for which it receives royalties. No provision for uncollectible accounts is established upon recognition of revenues. Contingent payments due under the asset purchase agreement for the sale of the Company’s former specialty pharmaceutical business are recognized as revenue when the milestone has been achieved and collection is assured, such payments are non-refundable and no further effort is required on the part of the Company or the other party to complete the earning process. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be realized. The effect of a change in tax rates or laws on deferred tax assets and liabilities is recognized in operations in the period that includes the enactment date of the rate change. A valuation allowance is established to reduce the deferred tax assets to the amounts that are more likely than not to be realized from operations. Tax benefits of uncertain tax positions are recognized only if it is more likely than not that the Company will be able to sustain a position taken on an income tax return. The Company has no liability for uncertain tax positions. Interest and penalties, if any, related to unrecognized tax benefits, would be recognized as income tax expense.

Recent Accounting Pronouncements	3 Months Ended
Recent Accounting Pronouncements	Mar. 31, 2020
Recent Accounting Pronouncements
Recent Accounting Pronouncements	(3) Recent Accounting Pronouncements Recent Accounting Standards Updates ("ASUs") issued by the Financial Accounting Standards Board ("FASB") and guidance issued by the Securities and Exchange Commission did not, or are not believed by management to, have a material effect on the Company’s present or future Condensed Consolidated Financial Statements.

Financial Instruments and Fair Value	3 Months Ended
Financial Instruments and Fair Value	Mar. 31, 2020
Financial Instruments and Fair Value
Financial Instruments and Fair Value	(4) Financial Instruments and Fair Value The carrying values of cash, other current assets, accounts payable, accrued expenses and other current liabilities in the Company’s condensed consolidated balance sheets approximated their fair values at March 31, 2020 and December 31, 2019 due to their short-term nature.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Supplemental Cash Flow Information	3 Months Ended
Supplemental Cash Flow Information	Mar. 31, 2020
Supplemental Cash Flow Information
Supplemental Cash Flow Information	(5) Supplemental Cash Flow Information The Company made income tax payments of $0 and $2,000 during the three months ended March 31, 2020 and 2019, respectively. There were no interest payments made during the three months ended March 31, 2020 or 2019.

Loss Per Common Share

3 Months Ended

Mar. 31, 2020

Loss Per Common Share

Loss Per Common Share

(6) Loss Per Common Share

Basic loss per common share is computed by dividing the net income by the weighted average number of shares of common stock outstanding during the period. Restricted stock awards and restricted stock units (collectively, nonvested shares) are not considered to be outstanding shares until the service or performance vesting period has been completed.

For purposes of calculating diluted earnings per common share, the denominator normally includes both the weighted-average number of shares of common stock outstanding and the number of common stock equivalents if the inclusion of such common stock equivalents is dilutive. Because a loss was incurred in each of the quarters ended March 31, 2019 and 2020, common stock equivalents would be anti-dilutive and, accordingly, were excluded from the calculation of diluted loss per share in each of the periods. Dilutive common stock equivalents potentially include stock options and nonvested shares using the treasury stock method and shares issuable under the employee stock purchase plan (ESPP). During each of the three-month periods ended March 31, 2020 and 2019, there were no common stock equivalents. Loss per common share information is as follows (in thousands, except per share amounts) for the three months ended March 31, 2020 and 2019:


	Three months ended
	March 31,
	2020		2019
Loss Per Common Share – Basic and Diluted:
Net loss	$	(242)	$	(371)

Weighted-average common shares outstanding		44,215		44,215

Basic and diluted loss per share	$	(0.01)	$	(0.01)

At March 31, 2020 and 2019, there were 41,787 potentially dilutive securities outstanding that have been excluded from the calculation of dilutive weighted average shares outstanding, as they would be anti-dilutive.

Cash Dividend	3 Months Ended
Cash Dividend	Mar. 31, 2020
Cash Dividend
Cash Dividend	(7) Cash Dividend On January 30, 2019, the Board of Directors of the Company declared a special cash dividend of $0.06 per share of the Company’s common stock, aggregating approximately $2,653,000, which was paid on March 21, 2019 to stockholders of record as of the close of business on February 21, 2019.

Stock Options

3 Months Ended

Mar. 31, 2020

Stock Options

Stock Options

(8) Stock Options

Stock Options and Restricted Stock Units (RSUs or Nonvested Shares)

During the quarter ended March 31, 2020 no options were granted and the Company incurred no stock-based compensation expense. No RSUs were outstanding as of March 31, 2020.

There were no options granted during the three months ended March 31, 2019 and no nonvested shares granted or outstanding during the three months ended March 31, 2019. The Company uses historical data to estimate forfeiture rates.

Activity related to stock options and nonvested shares during the three months ended March 31, 2020 and related balances outstanding as of that date are reflected below:


		Stock
		Options
Outstanding at January 1, 2020		41,787
Granted		—
Exercised and vested		—
Expired and forfeited		—
Outstanding at March 31, 2020		41,787

Options vested and expected to vest at March 31, 2020		41,787

Options exercisable at March 31, 2020		41,787

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2020
Income Taxes
Income Taxes	(9) Income Taxes During each of the three-month periods ended March 31, 2020 and 2019, the Company recorded approximately $2,000 and $2,000, respectively, of income tax expense for NJ state income tax. The Company continues to provide a valuation allowance against all of its deferred tax assets, as the Company believes it is more likely than not that its deferred tax assets will not be realized. Management of the Company will continue to assess the need for this valuation allowance and will make adjustments when appropriate. Tax benefits of uncertain tax positions are recognized only if it is more likely than not that the Company will be able to sustain a position taken on an income tax return. The Company has no liability for uncertain tax positions. Interest and penalties, if any, related to unrecognized tax benefits, would be recognized as income tax expense. On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was signed into law. Among its numerous changes to the Internal Revenue Code, the Act allowed companies with existing alternative minimum tax credit (“MTC”) carryforwards as of December 31, 2017 to receive refunds of the credits in tax years after 2017 and before 2022 in an amount equal to 50% (100% in 2021) of the excess MTC over the amount of the credit allowable for the year against regular tax liability. As a result of the Act’s provision allowing for the refund of MTC, the Company had recorded $485,000 as a long-term receivable and $485,000 as a current receivable as of December 31, 2019. As a result of provision in the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) that was signed into law on March 27, 2020, the Company was able to reclassify the remaining long-term receivable of $485,000 as a current receivable as of March 31, 2020. The CARES Act also provides for an indefinite carryforward period and 5 year carryback period for net operating losses generated after 2017 but before 2021 and removes the annual utilization limit of 80% of taxable income and allows the net operating losses to offset 100% of taxable income during this period. Net operating losses generated prior to 2018 continue to be carried forward for 20 years and have no 80% limitation on utilization.

Commitments and Contingent Liabilities	3 Months Ended
Commitments and Contingent Liabilities	Mar. 31, 2020
Commitments and Contingent Liabilities
Commitments and Contingent Liabilities	(10) Commitments and Contingent Liabilities In December 2019, an outbreak of a novel strain of coronavirus (COVID-19) was reported in Wuhan, China. On March 11, 2020, the World Health Organization characterized the global spread of COVID-19 as a pandemic. In an effort to slow the spread of the virus, the United States and many other countries around the world imposed restrictions on non-essential work activities, travel and mass gatherings. It is not known when and the extent to which these restrictions will be eased or the ultimate impact these unprecedented actions will have on the Company’s financial condition and prospects. At the present time, the Company’s business activities have been largely unaffected by COVID 19 restrictions as the Company’s workforce is comprised solely of independent contractors who are able to perform their duties remotely. However, these restrictions may impact the third parties who are responsible for obtaining final approval of and manufacturing product candidates for which we share the right to receive licensing fees, milestone payments and royalty revenues. If those third parties are required to curtail their business activities for a significant time, or if global supply chain disruptions impact their ability to procure needed resources, raw materials or components, the Company’s right to receive licensing fees, milestone payments or royalties could be materially and adversely affected. Additionally, the development timeline for product candidates being developed by third parties that are pending FDA approval could be delayed if the agency is required to shift resources to the review and approval of candidates for treatment of COVID 19. Effective March 1, 2018, the Company renewed its office service agreement with Regus Management Group, LLC (“Regus”) for its principal executive offices at 20 Commerce Drive, Suite 135, Cranford, New Jersey, 07016. This agreement was renewed until February 28, 2019, for a monthly fee of $1,259. In June 2018, the Company and Regus agreed to end the lease on August 31, 2018, and replace it with an updated office service agreement. Effective September 1, 2018, the Company entered into an office service agreement with Regus for mailbox plus, telephone answering, and virtual office services. Under the agreement, in exchange for the services provided by Regus, the Company was required to pay Regus an initial service retainer of $259 and thereafter pay Regus a monthly fee of $259 until August 31, 2019. The term of this agreement was extended until August 31, 2020 at a monthly fee of $259. Effective July 1, 2018, the Company entered into an office rental agreement with Equinox Junior LLC (“Equinox”) for use of office space at 3556 Main Street, Manchester, VT, 05225. Under this agreement, in exchange for the Company’s right to use the office space at this location, the Company was required to pay Equinox a monthly fee of $708 until June 30, 2019. The term of this agreement was extended until June 30, 2020 at a monthly fee of $729. The Company has notified Equinox that it will not be renewing the office rental agreement. The Company has been involved in various claims and legal actions arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material effect on the Company’s consolidated financial position, results of operations, or liquidity.

Plan of Liquidation and Dissolution	3 Months Ended
Plan of Liquidation and Dissolution	Mar. 31, 2020
Plan of Liquidation and Dissolution
Plan of Liquidation and Dissolution	(11) Plan of Liquidation and Dissolution On February 4, 2016, the Company’s Board of Directors adopted a Plan of Liquidation and Dissolution (the “Plan of Liquidation and Dissolution”), pursuant to which the Company would, subject to obtaining requisite stockholder approval, be liquidated and dissolved in accordance with Sections 280 and 281 (a) of the General Corporation Law of the State of Delaware. In approving the Plan of Liquidation and Dissolution, the Company’s Board of Directors had considered, among other factors, the ability of the Company to obtain no-action relief from the SEC to suspend certain of the Company’s reporting obligations under the Securities Exchange Act of 1934, as amended, and the anticipated cost savings if such relief is granted by the SEC. After further consideration, the Company’s Board of Directors determined that it would be fair, advisable and in the best interests of the Company and its stockholders to postpone seeking stockholder approval of the Plan of Liquidation and Dissolution until a later time to be determined by the Company’s Board of Directors. From time to time, the Company’s Board of Directors reviews the Company’s status and prospects in deciding on the timing of dissolution and liquidation of the Company pursuant to the Plan of Liquidation and Dissolution. If the Company’s Board of Directors determines to seek stockholder approval of such plan and such plan is approved by the Company’s stockholders and implemented by the Company, it is expected that the Company’s corporate existence will continue for the purpose of winding up its business and affairs for at least three years. The Company has forecasted minimal or no royalty or milestone revenues for the foreseeable future. In light of the uncertainty as to whether any of the milestones under the Micromet Marketing Agreement would be achieved, this forecast assumes that the Company would not receive any milestone or royalty payments under the Micromet Marketing Agreement.

Accounts Payable and Accrued Expenses	3 Months Ended
Accounts Payable and Accrued Expenses	Mar. 31, 2020
Accounts Payable and Accrued Expenses
Accounts Payable and Accrued Expenses	(12) Accounts Payable As of December 31, 2019, according to Merck, the Company had a net liability to Merck (net of a 25% royalty interest that the Company had previously sold) aggregating approximately $324,000. This was based on Merck’s assertions regarding the net result of overpayments, rebates and returns related to prior periods sales of PegIntron. Merck expected to recoup such overpayments through reductions of future royalties earned by the Company. In the first quarter of 2020, as reported by Merck, net royalties from PegIntron were approximately $2,000. As such, as asserted by Merck, the Company’s liability to Merck was approximately $322,000 at March 31, 2020. The Company believes that it will receive no more royalties from Merck, but may be charged with additional chargebacks from returns and rebates in amounts that, based on current estimates, are not expected to be material.

Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Mar. 31, 2020
Basis of Presentation
Interim Financial Statements	Interim Financial Statements The accompanying unaudited condensed consolidated financial statements have been prepared from the books and records of the Company in accordance with United States generally accepted accounting principles (U.S. GAAP) for interim financial information and Rule 10‑01 of Regulation S-X promulgated by the U.S. Securities and Exchange Commission (the “SEC”). Accordingly, these financial statements do not include all of the information and footnotes required for complete annual financial statements. Interim results are not necessarily indicative of the results that may be expected for the full year. Interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2019.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated as part of the consolidation.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. These estimates include legal and contractual contingencies and income taxes. Although management bases its estimates on historical experience, relevant current information and various other assumptions that are believed to be reasonable under the circumstances, actual results could differ from these estimates.
Revenue Recognition	Revenue Recognition Royalty revenues from the Company’s agreements with third parties are recognized when the Company can reasonably determine the amounts earned. In most cases, this will be upon notification from the third-party licensee, which is typically during the quarter following the quarter in which the sales occurred. The Company does not participate in the selling or marketing of products for which it receives royalties. No provision for uncollectible accounts is established upon recognition of revenues. Contingent payments due under the asset purchase agreement for the sale of the Company’s former specialty pharmaceutical business are recognized as revenue when the milestone has been achieved and collection is assured, such payments are non-refundable and no further effort is required on the part of the Company or the other party to complete the earning process.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be realized. The effect of a change in tax rates or laws on deferred tax assets and liabilities is recognized in operations in the period that includes the enactment date of the rate change. A valuation allowance is established to reduce the deferred tax assets to the amounts that are more likely than not to be realized from operations. Tax benefits of uncertain tax positions are recognized only if it is more likely than not that the Company will be able to sustain a position taken on an income tax return. The Company has no liability for uncertain tax positions. Interest and penalties, if any, related to unrecognized tax benefits, would be recognized as income tax expense.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 740
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650

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+ Details

Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2020

Loss Per Common Share

Schedule of loss per common share information, basic and diluted

Loss per common share information is as follows (in thousands, except per share amounts) for the three months ended March 31, 2020 and 2019:


	Three months ended
	March 31,
	2020		2019
Loss Per Common Share – Basic and Diluted:
Net loss	$	(242)	$	(371)

Weighted-average common shares outstanding		44,215		44,215

Basic and diluted loss per share	$	(0.01)	$	(0.01)

Stock Options (Tables)

3 Months Ended

Mar. 31, 2020

Stock Options

Schedule of share-based compensation stock options activity

Activity related to stock options and nonvested shares during the three months ended March 31, 2020 and related balances outstanding as of that date are reflected below:


		Stock
		Options
Outstanding at January 1, 2020		41,787
Granted		—
Exercised and vested		—
Expired and forfeited		—
Outstanding at March 31, 2020		41,787

Options vested and expected to vest at March 31, 2020		41,787

Options exercisable at March 31, 2020		41,787

Description of Business (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
Description of Business (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jan. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Description of Business [Line Items]
Accounts Payable, Current			$ 322		$ 324
Revenues			2	$ (51)
Milestone Receivable on Royalties current				7,000
Proceeds from Milestone on Royalty	$ 7,000
Royalty [Member]
Description of Business [Line Items]
Revenues			1,752	$ 51,000
Merck [Member]
Description of Business [Line Items]
Accounts Payable, Current			$ 322,000		$ 324,000
Servier I P U K Limited [Member]
Description of Business [Line Items]
Business days to receive payment			3 days
Royalty Revenue Milestones		$ 7,000
Servier I P U K Limited [Member] \| Minimum [Member]
Description of Business [Line Items]
Patient age			1 month
Servier I P U K Limited [Member] \| Maximum [Member]
Description of Business [Line Items]
Patient age			21 years
Micromet [Member]
Description of Business [Line Items]
Duration of possible royalties received			10 years
Percentage of Royal Milestones Receivable			50.00%

Basis of Presentation (Details)	3 Months Ended
Basis of Presentation (Details)	Mar. 31, 2020 USD ($)
Basis of Presentation
Provision for uncollectible accounts	$ 0
Liability for uncertain tax positions	$ 0

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental Cash Flow Information
Income Taxes Paid	$ 0	$ 2,000
Interest Paid, Net	$ 0	$ 0

Loss Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Loss Per Common Share - Basic and Diluted:
Net loss	$ (242)	$ (371)
Weighted-average number of common shares outstanding	44,215	44,215
Basic and diluted loss per share	$ (0.01)	$ (0.01)
Antidilutive securities	41,787	41,787

Cash Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Mar. 21, 2019	Jan. 30, 2019	Mar. 31, 2019
Cash Dividend
Common Stock, Dividends, Per Share, Declared		$ 0.06
Payments of Ordinary Dividends, Common Stock	$ 2,653,000		$ 2,653

Stock-Based Compensation (Details) - USD ($)	3 Months Ended
Stock-Based Compensation (Details) - USD ($)	Mar. 31, 2020	Mar. 31, 2019
Stock Options
Nonvested shares outstanding	0	0
Nonvested shares granted	0	0
Stock-based compensation expense	$ 0
Outstanding at January 1, 2020	41,787
Granted	0	0
Exercised and vested	0
Expired and forfeited	0
Outstanding at March 31, 2020	41,787
Options vested and expected to vest at March 31, 2020	41,787
Options exercisable at March 31, 2020	41,787

Income Taxes (Details)	3 Months Ended			12 Months Ended
Income Taxes (Details)	Mar. 31, 2021	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Liability for uncertain tax positions		$ 0
Income Taxes Receivable, Current		970,000		$ 485,000
Income Taxes Receivable, Noncurrent		0		$ 485,000
Income Tax Expense (Benefit)		2,000	$ 2,000
Operating Loss Carryforwards, Limitation on Annual Utilization				80
New jersey State [Member]
Income Taxes [Line Items]
Income Tax Expense (Benefit)		2,000	$ 2,000
CARES Act
Income Taxes [Line Items]
Income Taxes Receivable, Current		$ 485,000
Operating Loss Carryforwards, Limitation on Annual Utilization		100			80
Operating Loss Carryforwards, Expiration Term					20 years
MTC
Income Taxes [Line Items]
Income Taxes Receivable, Current				$ 485,000
Income Taxes Receivable, Noncurrent				$ 485,000
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	100.00%					50.00%

Commitments and Contingent Liabilities (Details) - USD ($)	Jun. 30, 2020	Aug. 31, 2019	Jun. 30, 2019	Feb. 28, 2019
Operating Leases, Rent Expense		$ 259	$ 708
Security Deposit		259
Service retainer		$ 259
Scenario, Forecast [Member]
Operating Leases, Rent Expense	$ 729
Regus Management Group, LLC [Member]
Operating Leases, Rent Expense				$ 1,259

Plan of Liquidation and Dissolution (Details)	3 Months Ended
Plan of Liquidation and Dissolution (Details)	Mar. 31, 2020
Minimum [Member]
Potential winding up period of corporate existence	3 years

Accounts Payable (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accounts Payable and Accrued Expenses
Net of royalty interest, percentage		25.00%
Accrued Royalties		$ 324,000
Due to Related Parties	$ 322,000
Accrued Royalties, Current	$ 2,000