Humanigen (HGENQ) 10-Q 15 May 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 14, 2020
Document and Entity Information
Entity Registrant Name	HUMANIGEN, INC
Entity Central Index Key	0001293310
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		126,341,542
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Entity File Number	001-35798
Document Quarterly Report	true
Document Transition Report	false
Entity Shell Company	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 68	$ 143
Prepaid expenses and other current assets	293	309
Total current assets	361	452
Restricted cash	71	71
Total assets	432	523
Current liabilities:
Accounts payable	5,906	5,046
Accrued expenses	3,500	3,308
Bridge Notes	2,149	2,113
Convertible notes - current	2,756	2,033
Notes payable to vendors	1,122	1,094
Total current liabilities	15,433	13,594
Convertible notes - non current	1,288	1,247
Total liabilities	16,721	14,841
Stockholders' deficit:
Common stock, $0.001 par value: 225,000,000 shares authorized at March 31, 2020 and December 31, 2019; 114,311,790 and 114,034,451 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	114	114
Additional paid-in capital	270,959	270,463
Accumulated deficit	(287,362)	(284,895)
Total stockholders' deficit	(16,289)	(14,318)
Total liabilities and stockholders' deficit	$ 432	$ 523

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	114,311,790	114,034,451
Common stock, shares outstanding	114,311,790	114,034,451

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating expenses:
Research and development	$ 659	$ 359
General and administrative	1,398	1,879
Total operating expenses	2,057	2,238
Loss from operations	(2,057)	(2,238)
Other expense:
Interest expense	(410)	(302)
Other income (expense), net		(1)
Net loss	$ (2,467)	$ (2,541)
Basic and diluted net loss per common share	$ (0.02)	$ (0.02)
Weighted average common shares outstanding used to calculate basic and diluted net loss per common share	114,270,532	110,033,098

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net loss	$ (2,467)	$ (2,541)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock based compensation expense	265	697
Issuance of common stock for payment of compensation	19	48
Issuance of common stock in exchange for services	13	68
Changes in operating assets and liabilities:
Prepaid expenses and other assets	16	5
Accounts payable	860	592
Accrued Expenses	687	447
Net cash used in operating activities	(607)	(684)
Financing activities:
Net proceeds from issuance of common stock	65
Proceeds from exercise of stock options		50
Net proceeds from issuance of convertible notes	467
Net cash provided by financing activities	532	50
Net decrease in cash, cash equivalents and restricted cash	(75)	(634)
Cash, cash equivalents and restricted cash, beginning of period	214	885
Cash, cash equivalents and restricted cash, end of period	139	251
Supplemental cash flow disclosure:
Cash paid for interest	2	1
Supplemental disclosure of non-cash investing and financing activities:
Issuance of stock options in lieu of cash compensation	133	195
Issuance of warrant for services	$ 1

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2018	$ 110	$ 266,381	$ (274,601)	$ (8,110)
Balances (in shares) at Dec. 31, 2018	109,872,526
Issuance of common stock in exchange for services	$ 82,432	68		68
Issuance of stock options for payment of compensation		195		195
Issuance of stock options for payment of compensation, shares
Issuance of common stock for payment of compensation		90		90
Issuance of common stock for payment of compensation, shares	93,358
Exercise of stock options		50		50
Exercise of stock options, shares	75,000
Issuance of warrant for services
Stock-based compensation expense		697		697
Net loss			(2,541)	(2,541)
Balances at Mar. 31, 2019	$ 110	267,481	(277,142)	(9,551)
Balances (in shares) at Mar. 31, 2019	110,148,316
Balances at Dec. 31, 2019	$ 114	270,463	(284,895)	(14,318)
Balances (in shares) at Dec. 31, 2019	114,034,451
Issuance of common stock		65		65
Issuance of common stock (in shares)	200,000
Issuance of common stock in exchange for services		13		13
Issuance of common stock in exchange for services, shares	29,342
Issuance of stock options for payment of compensation		133		133
Issuance of common stock for payment of compensation		19		$ 19
Issuance of common stock for payment of compensation, shares	47,997
Exercise of stock options, shares
Issuance of warrant for services		1		$ 1
Stock-based compensation expense		265		265
Net loss			(2,467)	(2,467)
Balances at Mar. 31, 2020	$ 114	$ 270,959	$ (287,362)	$ (16,289)
Balances (in shares) at Mar. 31, 2020	114,311,790

Nature of Operations

Nature of Operations	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	1. Nature of Operations Description of the Business The Company was incorporated on March 15, 2000 in California and reincorporated as a Delaware corporation in September 2001 under the name KaloBios Pharmaceuticals, Inc. Effective August 7, 2017, the Company changed its legal name to Humanigen, Inc. During February 2018, the Company completed the restructuring transactions announced in December 2017 and continued its transformation into a clinical-stage biopharmaceutical company by further The Company’s lead product candidate is lenzilumab, a proprietary Humaneered® monoclonal antibody (a biologic) that has been demonstrated to neutralize a naturally occurring inflammatory factor (GM-CSF). GM-CSF is a cytokine which acts directly on myeloid cells to cause expansion, activation, and to initiate and promote the production of other chemokines, including MCP-1, MIP-1a, and IP-10, and cytokines, including TNFa, IL-6 and IL-1 as part of the body’s immune response. GM-CSF is thought of as a communication conduit between the innate and adaptive immune systems. Once initiated, the inflammatory cascade in certain cases may quickly evolve into a self-perpetuating “storm” as the production of chemokines increases expansion and trafficking of myeloid cells. This, in turn, leads to abnormally high levels of inflammatory cytokines, endothelial activation, vascular permeability, disseminated intravascular coagulation, and neurologic inflammation. This “cytokine storm” is frequently referred to as cytokine release syndrome, or CRS. The neutralization of GM-CSF has been shown to prevent and potentially treat cytokine storm through a decrease in levels of IL-6, MCP-1, MIP1a, IP-10, VEGF, TNFα and other factors and reduce levels of inflammatory myeloid cells. Reduction of these factors demonstrates that GM-CSF is a critical upstream and early regulator of many inflammatory cytokines known to be important in the pathophysiology of CRS (Sterner RM et al. Blood 2019. 133(7): 697–709). During 2019 and throughout the early portion of the first quarter of 2020, the Company continued to pursue its anti-GM-CSF programs to prevent or reduce the serious and potentially life-threatening side effects associated with chimeric antigen receptor T-cell (“CAR-T”) therapy and to prevent or treat graft-versus-host disease (“GvHD”) in patients undergoing allogeneic hematopoietic stem cell transplantation (“HSCT”). In collaboration with Kite Pharmaceuticals, Inc., a Gilead company (“Kite or the “Kite Collaboration”), the Company seeks to study the effect of lenzilumab on the safety of Yescarta®, axicabtagene ciloleucel (“Yescarta”), Kite’s FDA-approved CAR-T therapy. A clinical trial is underway to measure the effect of lenzilumab in reducing CRS and neurotoxicity (NT), with a secondary endpoint of increased efficacy of Yescarta. The recent coronavirus pandemic, which is due to the SARS-CoV-2 virus and leads to the condition referred to as COVID-19, is frequently characterized in the later and sometimes fatal stages by severe, progressive viral pneumonia that can progress to acute respiratory distress syndrome (“ARDS”), respiratory failure and death. Recent publications indicate that ARDS in this setting is caused by the body’s autoimmune response to CRS. Published data point to GM-CSF being a key triggering cytokine, with elevated levels especially in those patients who transition to the Intensive Care Unit (“ICU”). In response to this published data indicating that GM-CSF inhibition may play a role in treating patients with COVID-19, the Company is developing lenzilumab in COVID-19 in a Phase III potential registration study. The Company has commenced enrollment in a multicenter randomized, placebo-controlled, double-blind clinical trial with lenzilumab for the prevention of respiratory failure and/or death in hospitalized patients with severe pneumonia associated with SARS-CoV-2 infection (Clinicaltrials.gov # NCT04351152). The Company has generated compassionate use data with lenzilumab in patients hospitalized with severe pneumonia associated with COVID-19 and is working with stakeholders to share these data. See Management’s Discussion and Analysis of Financial Condition and Results of Operations in Item 2 of this Quarterly Report on Form 10-Q for additional information regarding the business. Liquidity and Going Concern The Company has incurred significant losses since its inception in March 2000 and had an accumulated deficit of $287.4 million as of March 31, 2020. At March 31, 2020, the Company had a working capital deficit of $15.1 million. To date, none of the Company’s product candidates has been approved for sale and therefore the Company has not generated any revenue from product sales. Management expects operating losses to continue for the foreseeable future. The Company will require additional financing in order to meet its anticipated cash flow needs, which are expected to increase as the Company’s clinical trial activities accelerate during the next twelve months. As a result, the Company will continue to require additional capital through equity offerings, debt financing and/or payments under new or existing licensing or collaboration agreements. If sufficient funds are not available on acceptable terms when needed, the Company could be required to significantly reduce its operating expenses and delay, reduce the scope of, or eliminate one or more of its development programs. The Company’s ability to access capital when needed is not assured and, if not achieved on a timely basis, could materially harm its business, financial condition and results of operations. These conditions raise substantial doubt about the Company’s ability to continue as a going concern. The Condensed Consolidated Financial Statements for the three months ended March 31, 2020 were prepared on the basis of a going concern, which contemplates that the Company will be able to realize assets and discharge liabilities in the normal course of business. The ability of the Company to meet its total liabilities of $16.7 million at March 31, 2020 and to continue as a going concern is dependent upon the availability of future funding. The financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern. Basis of Presentation The accompanying interim unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and on a basis consistent with the annual consolidated financial statements and include all adjustments necessary for the presentation of the Company’s condensed consolidated financial position, results of operations and cash flows for the periods presented. The Condensed Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries. These financial statements have been prepared on a basis that assumes that the Company will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The December 31, 2019 Condensed Consolidated Balance Sheet was derived from the audited financial statements but does not include all disclosures required by U.S. GAAP. These interim financial results are not necessarily indicative of the results to be expected for the year ending December 31, 2020, or for any other future annual or interim period. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto included in the Company’s 2019 Form 10-K. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts and disclosures reported in the Condensed Consolidated Financial Statements and accompanying notes. Actual results could differ materially from those estimates. The Company believes judgment is involved in determining the valuation of the fair value-based measurement of stock-based compensation and warrant valuations. The Company evaluates its estimates and assumptions as facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the Condensed Consolidated Financial Statements. Certain prior year amounts have been reclassified to conform to the current year presentation. Such reclassifications had no effect on prior years’ Net loss or Stockholders’ deficit.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies There have been no material changes in the Company’s significant accounting policies since those previously disclosed in the 2019 Form 10-K. Derivative Financial Instruments The Company has equity conversion features within its 2020 Convertible Redeemable Notes that qualify as embedded derivatives under the guidance of FASB ASC Topic 815, Derivatives and Hedging

Potentially Dilutive Securities

Potentially Dilutive Securities	3 Months Ended
	Mar. 31, 2020
Potentially Dilutive Securities
Potentially Dilutive Securities	3. Potentially Dilutive Securities The Company’s potentially dilutive securities, which include stock options, restricted stock units and warrants, have been excluded from the computation of diluted net loss per common share as the effect of including those securities would be to reduce the net loss per common share and be antidilutive. Therefore, the denominator used to calculate both basic and diluted net loss per common share is the same in each period presented. The following outstanding potentially dilutive securities have been excluded from the computations of diluted net loss per common share: As of March 31, 2020 2019 Options to purchase common stock 17,104,649 16,062,922 Warrants to purchase common stock 331,193 331,193 17,435,842 16,394,115

Debt

Debt	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Debt	4. Debt Notes Payable to Vendors On June 30, 2016, the Company issued promissory notes in an aggregate principal amount of approximately $1.2 million to certain claimants in accordance with the Company’s Plan of Reorganization (the “Plan”) filed with the United States Bankruptcy Court for the District of Delaware (the “Bankruptcy Court”) (Case No. 15-12628 (LSS) (the “Bankruptcy Case”) which became effective June 30, 2016, at which time the Company emerged from its Chapter 11 bankruptcy proceedings. The notes are unsecured, bear interest at 10% per annum and became due and payable in full, including principal and accrued interest on June 30, 2019. In July and August, 2019, following the receipt of proceeds from the 2019 Bridge Notes, the Company used approximately $0.5 million of the proceeds to retire a portion of these notes, including accrued interest. After giving effect to these payments, the aggregate principal amount and accrued but unpaid interest on these notes approximates $1.1 million as of March 31, 2020. As of March 31, 2020 and December 31, 2019, the Company has accrued $0.3 million and $0.3 million in interest related to these promissory notes, respectively. The outstanding principal amount and accrued but unpaid interest on these notes is currently payable to the respective holders without demand, notice or declaration, and the holders, without demand or notice of any kind, may exercise any and all other rights and remedies available to them under the notes, the Plan, at law or in equity. We do not have sufficient funds to repay the principal and accrued but unpaid interest on these notes in their entirety. Advance Notes In June, July and August, 2018 the Company received an aggregate of $0.9 million of proceeds from advances made to the Company (the “Advance Notes”) by four different lenders including Dr. Cameron Durrant, the Company’s Chairman and Chief Executive Officer; Cheval Holdings, Ltd., an affiliate of Black Horse Capital, L.P., the Company’s controlling stockholder; and Ronald Barliant, a director of the Company (collectively the “Lenders”). The Advance Notes accrued interest at a rate of 7% per year, compounded annually. In accordance with their terms, on May 30, 2019, in connection with the Company’s announcement of the Collaboration Agreement with Kite, the lenders converted the amounts due under the Advance Notes into the Company’s common stock at the conversion price of $0.45 per share. The Company issued a total of 2,179,622 shares of common stock in connection with the conversion. 2018 Convertible Notes Commencing September 19, 2018, the Company delivered a series of convertible promissory notes (the “2018 Notes”) evidencing an aggregate of $2.5 million of loans made to the Company by six different lenders, including an affiliate of Black Horse Capital, L.P., the Company’s controlling stockholder. The 2018 Notes bear interest at a rate of 7% per annum and will mature on the earliest of (i) twenty-four months from the date the 2018 Notes were signed, (ii) the occurrence of any customary event of default, or (iii) the certain liquidation events including any dissolution or winding up of the Company or merger or sale by the Company of all or substantially all of its assets (in any case, a “Liquidation Event”). The Company used the proceeds from the 2018 Notes for working capital. Following the end of the quarter ended March 31, 2020, holders of the 2018 Notes notified us of their exercise of their conversion rights. Please see Note 11 – Subsequent Events for additional information. As of March 31, 2020 and December 31, 2019, the Company has accrued $0.3 million and $0.2 million in interest related to these promissory notes, respectively. 2019 Convertible Notes Commencing on April 23, 2019, the Company delivered a series of convertible promissory notes (the “2019 Notes”) evidencing an aggregate of $1.3 million of loans made to the Company. The 2019 Notes bear interest at a rate of 7.5% per annum and will mature on the earliest of (i) twenty-four months from the date the 2019 Notes are signed (the “Stated Maturity Date”), (ii) the occurrence of any customary event of default, or (iii) the certain liquidation events including any dissolution or winding up of the Company or merger or sale by the Company of all or substantially all of its assets (in any case, a “Liquidation Event”). The Company used the proceeds from the 2019 Notes for working capital. Following the end of the quarter ended March 31, 2020, holders of the 2019 Notes notified us of their exercise of their conversion rights. Please see Note 11 – Subsequent Events for additional information. As of March 31, 2020 and December 31, 2019, the Company had accrued $0.1 million and $0.1 million in interest related to these promissory notes, respectively. The Advance Notes, the 2018 Notes and the 2019 Notes have an optional voluntary conversion feature in which the holder could convert the notes in the Company’s common stock at maturity at a conversion rate of $0.45 per share for the Advance Notes and the 2018 Notes and at a conversion rate of $1.25 for the 2019 Notes. The intrinsic value of this beneficial conversion feature was $1.8 million upon the issuance of the Advance Notes, the 2018 Notes and the 2019 Notes and was recorded as additional paid-in capital and as a debt discount which is accreted to interest expense over the term of the Advance Notes and Notes. Interest expense includes debt discount amortization of $0.2 million for the three months ended March 31, 2020. The Company evaluated the embedded features within the Advance Notes, the 2018 Notes and the 2019 Notes to determine if the embedded features are required to be bifurcated and recognized as derivative instruments. The Company determined that the Advance Notes, the 2018 Notes and the 2019 Notes contain contingent beneficial conversion features (“CBCF”) that allow or require the holder to convert the Advance Notes, the 2018 Notes and the 2019 Notes, as applicable, to Company common stock at a conversion rate of $0.45 per share for the Advance Notes and the 2018 Notes and $1.25 for the 2019 Notes, but did not contain embedded features requiring bifurcation and recognition as derivative instruments. Upon the occurrence of a CBCF that results in conversion of the Advance Notes, the 2018 Notes or the 2019 Notes to Company common stock, the remaining unamortized discount will be charged to interest expense. Upon conversion of the Advance Notes on May 30, 2019, the remaining unamortized discount was charged to interest expense. The remaining debt discount for the 2018 and 2019 will be charged to interest expense in the second quarter of 2020 with their conversion in April 2020. 2020 Convertible Redeemable Notes On March 13, 2020 and March 19, 2020 (the “Issuance Dates”), the Company delivered two convertible redeemable promissory notes (the “2020 Notes”) evidencing loans with an aggregate principal amount of $518,333 made to the Company. The 2020 Notes bear interest at a rate of 7.0% per annum and will mature on March 13, 2021 and March 19, 2021, respectively. The 2020 Notes contain an original issue discount of $33,000 and $18,833, respectively. The Company used the proceeds from the 2020 Notes for working capital. Beginning on the six month anniversary of the Issuance Dates, unless earlier redeemed by the Company, the holders are entitled, at their option, to convert all or any amount of the principal amount of the 2020 Notes then outstanding, together with the accrued and unpaid interest on such portion of the 2020 Notes proposed to be converted, into shares of the Company’s common stock (the "Common Stock") at a conversion price equal to $0.25 per share (the “Fixed Price”). After the nine month anniversary of the Issuance Dates, the conversion price shall be equal to the lower of (i) the Fixed Price or (ii) 68% of the lowest of either the trading price or closing bid of the Common Stock, for the ten prior trading days including the day upon which a Notice of Conversion is received (the “Variable Conversion Price”). In the event our Common Stock has a closing price equal to $0.30 or less for 5 consecutive days prior to the 9 month anniversary of the Issuance Date, then, beginning on the 6 month anniversary of the Issuance Date, the holders may elect in their respective Notice of Conversion to use the lower of the Fixed Price or the Variable Conversion Price set forth above. Commencing on the 6 month anniversary of the Issuance Dates, the Company will have the right, but not the obligation, to elect to make fixed monthly amortizing payments to the holders in the amount of $25,000 and $14,250, respectively. If we elect to make such payments, the holders shall not be entitled to convert all or any amount of the principal amount of the 2020 Notes then outstanding if and for so long as we are current in respect of the amortizing payments. The 2020 Notes may be redeemed by us at any time before the 270 th As of March 31, 2020, the Company has accrued $1,600 in interest related to the 2020 Notes. The Company evaluated the embedded features within the 2020 Notes and determined that the embedded features are required to be bifurcated and recognized as stand-alone derivative instruments. The variable-share settlement features within the 2020 Notes qualify as redemption features and meet the net settlement criterion for qualification as a stand-alone derivative. In determining the fair value of the bifurcated derivative, the Company evaluated the likelihood of conversion of the 2020 Notes to Company stock. As the Company believes it will have adequate funding prior to the six month anniversary of the 2020 Notes, the first conversion option for the holders of the 2020 Notes, and it has the intent to either begin making amortizing payments or to pay off the 2020 Notes in their entirety prior to that date, the fair value was determined to be $0 as of March 31, 2020. The original issue discount is being accreted to interest expense over the term of the 2020 Notes. Interest expense includes the original issue discount amortization of approximately $4,000 for the three months ended March 31, 2020. 2019 Bridge Notes On June 28, 2019, the Company issued three short-term, secured bridge notes (the “June Bridge Notes”) evidencing an aggregate of $1.7 million of loans made to the Company by three parties: Cheval Holdings, Ltd., an affiliate of Black Horse Capital, L.P., the Company’s controlling stockholder, lent $750,000; Nomis Bay LTD, the Company’s second largest stockholder, lent $750,000; and Dr. Cameron Durrant, the Company’s Chief Executive Officer and Chairman of the Board of Directors, lent $200,000. The proceeds from the June Bridge Notes were used to satisfy a portion of the unsecured obligations incurred in connection with the Company’s emergence from bankruptcy in 2016 and for working capital and general corporate purposes. Of the $1.7 million in proceeds received, $950,000 was received on June 28, 2019 and was recorded as Advance notes in the Condensed Consolidated Balance Sheet as of June 30, 2019. The remaining proceeds of $750,000 were received July 1, 2019 and recorded accordingly. The June Bridge Notes bear interest at a rate of 7.0% per annum and had an original maturity date of October 1, 2019, which the Company and the lenders agreed to extend until December 31, 2020. No other changes to the terms of the June Bridge Notes were made in connection with the extension of the maturity date. The June Bridge Notes may become due and payable at such earlier time as the Company raises more than $3,000,000 in a bona fide financing transaction or upon a change in control. The June Bridge Notes are secured by liens on substantially all of the Company’s assets. On November 12, 2019, the Company issued two short-term, secured bridge notes (the “November Bridge Notes” and together with the June Bridge Notes, the “2019 Bridge Notes”) evidencing an aggregate of $350,000 of loans made to the Company by two parties: Cheval Holdings, Ltd., an affiliate of Black Horse Capital, L.P., our controlling stockholder, lent $250,000; and Dr. Cameron Durrant, our Chief Executive Officer and Chairman of our Board of Directors, lent $100,000 The November Bridge Notes rank on par with the June Bridge Notes, and possess other terms and conditions substantially consistent with those notes. The November Bridge Notes bear interest at a rate of 7.0% per annum and had an original maturity date of December 31, 2019, which the Company and the lenders agreed to extend until December 31, 2020. No other changes to the terms of the November Bridge Notes were made in connection with the extension of the maturity date. The November Bridge Notes may become due and payable at such earlier time as the Company raises more than $3,000,000 in a bona fide financing transaction or upon a change in control. The November Bridge Notes also are secured by a lien on substantially all of the Company’s assets. Upon an event of default, which events include, but are not limited to, (1) the Company’s failure to timely pay any monetary obligation under the 2019 Bridge Notes; (2) our failure to pay our debts generally as they become due and (3) our commencing any proceeding relating to the Company under any bankruptcy reorganization, arrangement, insolvency, readjustment of debt, dissolution or liquidation or similar laws of any jurisdiction now or hereafter in effect, the interest payable on the 2019 Bridge Notes increases to 10.0% per annum. Further, upon certain events of default, all payments and obligations due and owed under the 2019 Bridge Notes shall immediately become due and payable without demand and without notice to the Company. As of March 31, 2020 and December 31, 2019, the Company has accrued $0.1 million and $0.1 million in interest related to these promissory notes, respectively. As of March 31, 2020, the maturities of the debt of the Company by year is as follows: Total 2020 2021 Principal payments on Notes payable to vendors $ 774 $ 774 $ - Interest payments on Notes payable to vendors 348 348 - Principal payments on 2019 Bridge notes 2,050 2,050 - Interest payments on 2019 Bridge notes 99 99 - Principal payments on Convertible notes 4,293 3,018 1,275 Interest payments on Convertible notes 358 270 88 Gross debt before unamortized discount 7,922 6,559 1,363 Unamortized debt discount on convertible debt (607 ) (532 ) (75 ) Total Debt $ 7,315 $ 6,027 $ 1,288

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	5. Derivative Instruments The Company has certain embedded equity conversion features within its 2020 Notes that require bifurcation and recognition as stand-alone derivatives. See Note 4 – Debt for additional information and discussion on the bifurcated derivatives.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	6. Commitments and Contingencies Contractual Obligations and Commitments As of March 31, 2020, other than the debt issuances described in Note 4 and the license agreements described in Note 8, there were no material changes to the Company’s contractual obligations from those set forth in the 2019 Form 10-K. Guarantees and Indemnifications The Company has certain agreements with service providers with which it does business that contain indemnification provisions pursuant to which the Company typically agrees to indemnify the party against certain types of third-party claims. The Company accrues for known indemnification issues when a loss is probable and can be reasonably estimated. The Company would also accrue for estimated incurred but unidentified indemnification issues based on historical activity. As the Company has not incurred any indemnification losses to date, there were no accruals for or expenses related to indemnification issues for any period presented.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2020
Stockholders' Equity Note [Abstract]
Stockholders' Equity	7. Stockholders’ Equity Lincoln Park Capital Purchase Agreement On November 8, 2019, the Company entered into a purchase agreement (the “Purchase Agreement”) and a registration rights agreement (the “Registration Rights Agreement”) with Lincoln Park Capital Fund, LLC (“LPC”), pursuant to which the Company has the right to sell to LPC up to $20,000,000 in shares of the Company’s common stock, $0.001 par value per share (the “Common Stock”), subject to certain limitations and conditions set forth in the Purchase Agreement. Under the Purchase Agreement, the Company has the right, from time to time at its sole discretion and subject to certain conditions, to direct LPC to purchase up to 100,000 shares of Common Stock, with such amounts increasing based on certain threshold prices but not to exceed $750,000 in total proceeds on any purchase date. The purchase price of shares of Common Stock pursuant to the Purchase Agreement will be based on the market prices of the Common Stock at the time of such purchases as set forth in the Purchase Agreement. Such sales of Common Stock by the Company, if any, may occur from time to time, at the Company’s option, over the 36-month period expiring in December 2022. In connection with the signing of the Purchase Agreement on November 8, 2019, the Company issued 706,592 shares of its common stock to LPC. The issuance of the shares were recorded as debt issuance costs in Common stock and Additional paid-in capital with no net effect on Stockholders’ deficit. In addition to regular purchases, as described above, the Company may also direct LPC to purchase additional amounts as accelerated purchases if the closing sale price of the Common Stock is not below certain threshold prices, as set forth in the Purchase Agreement. In all instances, the Company may not sell shares of its Common Stock to LPC under the Purchase Agreement if it would result in LPC beneficially owning more than 4.99% of the Common Stock then outstanding. LPC represented to the Company, among other things, that it was an “accredited investor” (as such term is defined in Rule 501(a) of Regulation D under the Securities Act of 1933, as amended (the “Securities Act”)), and the Company sold the securities to LPC pursuant to the exemption for transactions by an issuer not involving any public offering under Section 4(a)(2) of, and Regulation D under, the Securities Act. The Purchase Agreement and the Registration Rights Agreement contain customary representations, warranties, agreements and conditions to completing future sale transactions, indemnification rights and obligations of the parties. The Company has the right to terminate the Purchase Agreement at any time, at no cost or penalty. During any “event of default” under the Purchase Agreement, all of which are outside of LPC’s control, LPC does not have the right to terminate the Purchase Agreement; however, the Company may not initiate any regular or other sale of shares to LPC until such event of default is cured. Actual sales of shares of Common Stock to LPC under the Purchase Agreement will depend on a variety of factors to be determined by the Company from time to time, including, among others, market conditions, the trading price of the Common Stock and determinations by the Company as to the appropriate sources of funding for the Company and its operations. In consideration for entering in the Purchase Agreement, the Company paid LPC a commitment fee in shares of Common Stock. The Company did not receive any cash proceeds from the issuance of these shares. The net proceeds under the Purchase Agreement to the Company will depend on the frequency and prices at which the Company sells shares of its stock to LPC. The Company expects that any proceeds received by the Company from such sales to LPC will be used for working capital and general corporate purposes. During the months of December 2019 and January 2020, the Company issued a total of 700,000 shares for aggregate proceeds of $0.3 million under the Purchase Agreement. Equity Financings During the month of December 2019, the Company issued 500,000 shares of its common stock for aggregate proceeds of $0.2 million under the Purchase Agreement. During the month of January 2020, the Company issued 200,000 shares of its common stock for aggregate proceeds of $0.1 million under the Purchase Agreement. 2012 Equity Incentive Plan Under the Company’s 2012 Equity Incentive Plan, the Company may grant shares, stock units, stock appreciation rights, performance cash awards and/or options to employees, directors, consultants, and other service providers. For options, the per share exercise price may not be less than the fair market value of a Company common share on the date of grant. Awards generally vest and become exercisable over three to four years and expire 10 years from the date of grant. Options generally become exercisable as they vest following the date of grant. A summary of stock option activity for the three months ended March 31, 2020 under all of the Company’s options plans is as follows: Options Weighted Outstanding at January 1, 2020 15,881,721 $ 0.95 Granted 1,223,033 0.40 Exercised - - Cancelled (forfeited) - - Cancelled (expired) (105 ) 11.68 Outstanding at March 31, 2020 17,104,649 $ 0.91 The weighted average fair value of options granted during the three months ended March 31, 2020 was $0.40 per share. The Company valued the options granted using the Black-Scholes options pricing model and the following weighted-average assumption terms for the three months ended : Three months ended March 31, 2020 Exercise price $0.38 - $0.40 Market value $0.38 - $0.40 Expected term 5 years Expected volatility 95% Risk-free interest rate 1.47% - 1.57% Expected dividend yield 0% Stock-Based Compensation The Company recorded stock-based compensation expense in the Condensed Consolidated Statements of Operations as follows: Three months ended March 31, 2020 2019 General and administrative $ 211 $ 697 Research and development 54 - Total stock-based compensation $ 265 $ 697 At March 31, 2020, the Company had $0.7 million of total unrecognized stock-based compensation expense, net of estimated forfeitures, related to outstanding stock options that will be recognized over a weighted-average period of 1.6 years.

License and Collaboration Agree

License and Collaboration Agreements	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
License and Collaboration Agreements	8. License and Collaboration Agreements Kite Agreement On May 30, 2019, the Company entered into a collaboration agreement (the “Kite Agreement”) with Kite Pharmaceuticals, Inc., pursuant to which the Company and Kite areconducting a multi-center Phase 1b/2 study of lenzilumab with Kite’s Yescarta in patients with relapsed or refractory B-cell lymphoma, including diffuse large B-cell lymphoma (“DLBCL”). The primary objective of the Study is to determine the effect of lenzilumab on the safety of Yescarta. Pursuant to the Kite Agreement, the Company shall supply lenzilumab to the collaboration for use in the study and will contribute up to approximately $8.0 million towards the out-of-pocket costs of the study, depending on the number of patients enrolled into the study. Mayo Agreement On June 19, 2019 the Company entered into an exclusive worldwide license agreement (the “Mayo Agreement”) with the Mayo Foundation for Medical Education and Research (“Mayo”) for certain technologies used to create CAR-T cells lacking GM-CSF expression through various gene-editing tools including CRISPR-Cas9 (GM-CSF knock-out). The license covers various patent applications and know-how developed by Mayo in collaboration with the Company. These licensed technologies complement and broaden the Company’s position in the GM-CSF neutralization space and expand the Company’s discovery platform aimed at improving CAR-T to include gene-edited CAR-T cells. Pursuant to the Mayo Agreement, the Company will pay $200,000 to Mayo within six months of the effective date, or upon completion of a qualified financing, whichever is earlier. The Mayo Agreement also requires the payment of milestones and royalties upon the achievement of certain regulatory and commercialization milestones. The Company accrued the initial payment and interest through March 31, 2020 in Accrued expenses in the accompanying Condensed Consolidated Balance Sheets as of December 31, 2019 and March 31, 2020. Zurich Agreement On July 19, 2019 the Company entered into an exclusive worldwide license agreement (the “Zurich Agreement”) with the University of Zurich (“UZH”) for technology used to prevent or treat Graft versus Host Disease (“GvHD”) through GM-CSF neutralization. The Zurich Agreement covers various patent applications filed by UZH which complement and broaden the Company’s position in the application of GM-CSF and expands the Company’s development platform to include improving allogeneic Hematopoietic Stem Cell Transplantation (“HSCT”). Pursuant to the Zurich Agreement, the Company paid $100,000 to UZH in July 2019. The Zurich Agreement also requires the payment of milestones and royalties upon the achievement of certain regulatory and commercialization milestones. The license payment of $100,000 was recorded as expense in Research and development in July 2019.

Savant Arrangements

Savant Arrangements	3 Months Ended
	Mar. 31, 2020
Savant Arrangements
Savant Arrangements	9. Savant Arrangements On June 30, 2016 the Company and Savant Neglected Diseases, LLC (“Savant”) entered into an Agreement for the Manufacture, Development and Commercialization of Benznidazole for Human Use (the “MDC Agreement”), pursuant to which the Company acquired certain worldwide rights relating to benznidazole (the “Compound”). In addition, on the Effective Date the Company and Savant also entered into a Security Agreement (the “Security Agreement”), pursuant to which the Company granted Savant a continuing senior security interest in the assets and rights acquired by the Company pursuant to the MDC Agreement and certain future assets developed from those acquired assets. On the Effective Date, the Company issued to Savant a five year warrant (the “Warrant”) to purchase 200,000 shares of the Company’s Common Stock, at an exercise price of $2.25 per share, subject to adjustment. The Warrant is exercisable for 25% of the shares immediately and exercisable for the remaining shares upon reaching certain regulatory related milestones. As of March 31, 2020 the number of shares for which the Warrant is currently exercisable totals 100,000 shares at an exercise price of $2.25 per share. As a result of the FDA granting accelerated and conditional approval of a benznidazole therapy manufactured by a competitor for the treatment of Chagas disease and awarding such competitor a neglected tropical disease PRV in August 2017, the Company ceased development of benznidazole and re-evaluated the final two vesting milestones and concluded that the probability of achievement of these milestones had decreased to 0%. In July 2017, the Company commenced litigation against Savant alleging that Savant breached the MDC Agreement and seeking a declaratory judgement. Savant has asserted counterclaims for breaches of contract under the MDC Agreement and the Security Agreement. The dispute primarily concerns the Company’s right under the MDC Agreement to offset certain costs incurred by the Company in excess of the agreed upon budget against payments due Savant. See Note 10, below, for more information regarding the Savant litigation. The aggregate cost overages as of June 30, 2017 that the Company asserts are Savant’s responsibility total approximately $3.4 million, net of a $0.5 million deductible. The Company asserts that it is entitled to offset $2.0 million in milestone payments due Savant against the cost overages, such that as of June 30, 2017, Savant owed the Company approximately $1.4 million. As of June 30, 2019, the cost overages totaled $4.1 million such that Savant owed the Company approximately $2.1 million in cost overages. Such cost overages have been charged to Research and development expense as incurred. Recovery of such cost overages, if any, will be recorded as a reduction of Research and development expense in the period received. The $2.0 million in milestone payments due Savant are included in Accrued expenses in the accompanying Condensed Consolidated Balance Sheet as of March 31, 2020 and December 31, 2019.

Litigation

Litigation	3 Months Ended
	Mar. 31, 2020
Litigation Settlement [Abstract]
Litigation	10. Litigation Savant Litigation On July 10, 2017, the Company filed a complaint against Savant in the Superior Court for the State of Delaware, New Castle County (the “Delaware Court”). KaloBios Pharmaceuticals, Inc. v. Savant Neglected Diseases, LLC On July 12, 2017, Savant removed the case to the Bankruptcy Court, claiming that the action is related to or arises under the Bankruptcy Case from which we emerged in July 2016. In re KaloBios Pharmaceuticals, Inc. On August 2, 2017, Savant sent a foreclosure notice to the Company, demanding that it provide the Collateral as defined in the Security Agreement for inspection and possession on August 9, 2017, with a public sale to be held on September 1, 2017. The Company moved for a Temporary Restraining Order (the “TRO”) and Preliminary Injunction in the Bankruptcy Court on August 4, 2017. Savant responded on August 7, 2017. On August 7, 2017, the Bankruptcy Court granted the Company’s motion for a TRO, entering an order prohibiting Savant from collecting on or selling the Collateral, entering our premises, issuing any default notices to us, or attempting to exercise any other remedies under the MDC Agreement or the Security Agreement. On August 9, 2017, the parties have stipulated to continue the provisions of the TRO in full force and effect until further order of the appropriate court, which the Bankruptcy Court signed that same day (the “Stipulated Order”). On January 22, 2018, Savant wrote to the Bankruptcy Court requesting dissolution of the TRO and the Stipulated Order. On January 29, 2018, the Bankruptcy Court granted the Motion to Remand and denied Savant’s request to dissolve the TRO and Stipulated Order, ordering that any request to dissolve the TRO and Stipulated Order be made to the Delaware Court. On February 13, 2018 Savant made a letter request to the Delaware Court to dissolve the TRO and Stipulated Order. Also on February 13, 2018, the Company filed its Answer and Affirmative defenses to Savant’s Counterclaims. On February 15, 2018 the Company filed a letter opposition to Savant’s request to dissolve the TRO and Stipulated Order and requesting a status conference. A hearing on Savant’s request to dissolve the TRO and Stipulated Order was held before the Delaware Court on March 19, 2018. The Delaware Court denied Savant’s request to dissolve the TRO and Stipulated order, which remain in effect. On April 11, 2018, the Company advised the Delaware Court that it would meet and confer with Savant regarding a proposed case management order and date for trial. On April 26, 2018 the Delaware Court so-ordered a proposed case management order submitted by the Company and Savant. The schedule in the case management order was modified by stipulation on August 24, 2018. On April 8, 2019, the Company moved to compel Savant to produce documents in response to the Company’s document requests. The parties thereafter agreed to a discovery schedule through June 30, 2019, which the Superior Court so-ordered, and the parties produced documents to each other. On June 4, 2019, Savant filed a complaint against the Company and Madison in the Delaware Court of Chancery (the “Chancery Action”) seeking to “recover as damages that amounts owed to it under the MDC Agreement, and to reclaim Savant’s intellectual property,” among other things. Savant also requested leave to move to dismiss the Company’s complaint on the grounds that the Company’s transfer of assets to Madison was champertous. On June 10, 2019, the Company requested by letter that the Superior Court hold a contempt hearing because the Chancery Action violated the TRO entered by the Bankruptcy Court, the terms of which have been extended by stipulation of the parties. On June 18, 2019, the Superior Court held a telephonic status conference. The parties agreed that the Chancery Action should be consolidated with the Superior Court action, after which the Superior Court would address the parties’ motions. On July 22, 2019, the Company moved for contempt against Savant. Savant filed its opposition on July 29, 2019. On August 12, 2019, the Superior Court denied the Company’s motion for contempt. On July 23, 2019, Savant moved for summary judgment on the issue of champerty. The Company filed its response and cross-motion for summary judgment on August 27, 2019. Savant filed its reply on September 10, 2019 and the Company filed its cross-reply on September 20, 2019. The motion is fully briefed, and was argued at a hearing on February 3, 2020. The court has not yet ruled on the motion. On July 26, 2019, the Company moved to modify the previously agreed-upon discovery schedule to extend discovery through December 31, 2019, which the Superior Court granted. In subsequent orders, the discovery schedule was further extended until the end of June 2020. On July 30, 2019, the Company filed a motion to dismiss Savant’s Chancery Action. Savant filed an amended complaint on September 4, 2019, and the Company filed its opening brief in support of its motion to dismiss on October 11, 2019. That motion is fully briefed and was argued at a hearing on February 3, 2020. The court has not yet ruled on the motion. On August 19, 2019, Savant moved to dismiss the Company’s amended Superior Court complaint. On September 27, 2019, the Company filed an opposition to Savant’s motion and, in the alternative, requested leave to file a second amended complaint against Savant. Savant consented to the filing of the second amended complaint and withdrew their motion to dismiss. Savant filed a partial motion to dismiss against a co-defendant on October 30, 2019. That motion is fully briefed and was argued at a hearing on February 3, 2020. At the February 3, 2020 hearing, the Court reserved judgment on the parties’ reciprocal motions. On November 18, 2019, the Court granted Savant’s Motion to Schedule a Preliminary Injunction hearing concerning the August 2017 TRO and Stipulated Order that are still in effect. At a hearing on April 28, 2020, the Court granted the application for a preliminary injunction to the Company, and the parties are preparing a proposed order to effectuate the Court’s rulings at the hearing. The Stipulated Order will no longer be in effect upon the entry of the preliminary injunction order. A trial is scheduled for October 2020.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	11. Subsequent Events Conversion of Outstanding 2018 and 2019 Convertible Notes As described in the Company’s 2019 Annual Report on Form 10-K, holders of the Company’s outstanding convertible notes issued in 2018 and 2019 are entitled to convert the principal and unpaid interest on such notes into shares of the Company’s common stock under various scenarios, including if the Company were to sell its equity securities on or before the date of repayment of the 2018 and 2019 Notes in any financing transaction that results in gross proceeds to the Company of less than $10 million (a “Non-Qualified Financing”). A Non-Qualified Financing occurred as a result of sales of our common stock to Lincoln Park Capital Fund, LLC starting on December 11, 2019 and concluding on January 7, 2020, pursuant to the Purchase Agreement described in Note 7, Stockholders’ Equity above. Commencing on April 2, 2020, the holders of such notes, including Cheval Holdings, Ltd. (“Cheval”), an affiliate of Black Horse Capital, L.P., our controlling stockholder, notified us of their exercise of such conversion rights. Pursuant to the exemption from registration afforded by Section 3(a)(9) under the Securities Act of 1933, we issued an aggregate of 11,989,578 shares of our common stock upon the conversion of $4.3 million in aggregate principal and interest on the notes converted, which obligations were retired. Of these, we issued 1,583,333 shares to Cheval. Dr. Dale Chappell, our ex-officio chief scientific officer, controls Black Horse Capital, L.P. and reports beneficial ownership of all shares held by it and its affiliates, including Cheval. After giving effect to the shares issued upon such conversions, as of May 14, 2020, no convertible notes issued in 2018 or 2019 were outstanding. April 2020 Bridge Notes On April 27, 2020, the Company issued two short-term, secured bridge notes (the “2020 Bridge Notes”) evidencing an aggregate of $350,000 of loans made to the Company by two parties: Cheval Holdings, Ltd., an affiliate of Black Horse Capital, L.P., the Company’s controlling stockholder, lent $100,000; and Nomis Bay LTD, lent $250,000 The 2020 Bridge Notes rank on par with the 2019 Bridge Notes, and possess other terms and conditions substantially consistent with those notes. The 2020 Bridge Notes bear interest at a rate of 7.0% per annum and have a maturity date of December 31, 2020. The 2020 Bridge Notes may become due and payable at such earlier time as the Company raises more than $10,000,000 in a bona fide financing transaction or upon a change in control. The 2020 Bridge Notes also are secured by a lien on substantially all of the Company’s assets. Upon an event of default, which events include, but are not limited to, (1) the Company’s failure to timely pay any monetary obligation under the 2020 Bridge Notes; (2) our failure to pay our debts generally as they become due and (3) our commencing any proceeding relating to the Company under any bankruptcy reorganization, arrangement, insolvency, readjustment of debt, dissolution or liquidation or similar laws of any jurisdiction now or hereafter in effect, the interest payable on the 2020 Bridge Notes increases to 10.0% per annum. Further, upon certain events of default, all payments and obligations due and owed under the 2020 Bridge Notes shall immediately become due and payable without demand and without notice to the Company. Paycheck Protection Plan Loan On May 5, 2020, the Company received a Paycheck Protection Plan loan under the 2020 CARES Act in the amount of $83 thousand (the “PPP Loan”). The PPP Loan bears interest at a rate of 1% per annum and matures on the second anniversary of the date of the applicable loan documents. The PPP loan may be prepaid at any time and may be forgiven under certain circumstances. Assuming the PPP Loan is not forgiven, the Company will be required to make monthly amortizing payments beginning November 1, 2020 to fully repay the PPP Loan and accrued interest through the maturity date. Upon an event of default, which events include, but are not limited to, (1) the Company’s failure to timely pay any monetary obligation under the PPP Loan; (2) our failure to pay our debts generally as they become due and (3) our commencing any proceeding relating to the Company under any bankruptcy reorganization, arrangement, insolvency, readjustment of debt, dissolution or liquidation or similar laws of any jurisdiction now or hereafter in effect, the PPP Loan shall immediately become due and payable without demand and without notice to the Company. The Company intends to use the proceeds of the PPP Loan for payroll costs.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company has equity conversion features within its 2020 Convertible Redeemable Notes that qualify as embedded derivatives under the guidance of FASB ASC Topic 815, Derivatives and Hedging

Potentially Dilutive Securiti_2

Potentially Dilutive Securities (Tables)	3 Months Ended
	Mar. 31, 2020
Potentially Dilutive Securities Tables
Potentially Dilutive Securities Excluded From Computation of Diluted Net Loss Per Common Share	The following outstanding potentially dilutive securities have been excluded from the computations of diluted net loss per common share: As of March 31, 2020 2019 Options to purchase common stock 17,104,649 16,062,922 Warrants to purchase common stock 331,193 331,193 17,435,842 16,394,115

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2020
Disclosure Text Block [Abstract]
Schedule of Maturities of Debt	As of March 31, 2020, the maturities of the debt of the Company by year is as follows: Total 2020 2021 Principal payments on Notes payable to vendors $ 774 $ 774 $ - Interest payments on Notes payable to vendors 348 348 - Principal payments on 2019 Bridge notes 2,050 2,050 - Interest payments on 2019 Bridge notes 99 99 - Principal payments on Convertible notes 4,293 3,018 1,275 Interest payments on Convertible notes 358 270 88 Gross debt before unamortized discount 7,922 6,559 1,363 Unamortized debt discount on convertible debt (607 ) (532 ) (75 ) Total Debt $ 7,315 $ 6,027 $ 1,288

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2020
Stockholders' Equity Note [Abstract]
Summary of stock option activity	A summary of stock option activity for the three months ended March 31, 2020 under all of the Company’s options plans is as follows: Options Weighted Outstanding at January 1, 2020 15,881,721 $ 0.95 Granted 1,223,033 0.40 Exercised - - Cancelled (forfeited) - - Cancelled (expired) (105 ) 11.68 Outstanding at March 31, 2020 17,104,649 $ 0.91
Schedule of fair value-based measurement of stock options granted under the entity's stock plans estimated using Black-Scholes model	The Company valued the options granted using the Black-Scholes options pricing model and the following weighted-average assumption terms for the three months ended : Three months ended March 31, 2020 Exercise price $0.38 - $0.40 Market value $0.38 - $0.40 Expected term 5 years Expected volatility 95% Risk-free interest rate 1.47% - 1.57% Expected dividend yield 0%
Schedule of total stock-based compensation expense recognized	The Company recorded stock-based compensation expense in the Condensed Consolidated Statements of Operations as follows: Three months ended March 31, 2020 2019 General and administrative $ 211 $ 697 Research and development 54 - Total stock-based compensation $ 265 $ 697

Nature of Operations (Details)

Nature of Operations (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)item	Dec. 31, 2019USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated deficit	$ 287,362	$ 284,895
Number of product candidates approved for sale | item	0
Total liabilities	$ 16,721	$ 14,841
Working capital deficit	$ 15,100

Potentially Dilutive Securiti_3

Potentially Dilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computations of diluted net loss per common share	17,435,842	16,394,115
Options to purchase common stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computations of diluted net loss per common share	17,104,649	16,062,922
Warrants to purchase common stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computations of diluted net loss per common share	331,193	331,193

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)

Nov. 12, 2019

Jul. 02, 2019

May 30, 2019

Sep. 19, 2018

Mar. 31, 2020

Mar. 31, 2019

Aug. 31, 2018

Jun. 28, 2019

Dec. 31, 2019

Dec. 31, 2020

Apr. 23, 2019

Jun. 30, 2016

Debt Instrument [Line Items]

Proceeds from advance notes

$ 900,000

Percentage of accrued interest

7.00%

Common stock conversion price

$ 0.45

Proceeds from convertible debt

$ 467,000

Issuance of common stock upon note conversions shares

2,179,622

Interest expense

410,000

302,000

Advance Notes [Member]

Debt Instrument [Line Items]

Proceeds from advance notes

1,700,000

2019 Bridge Notes [Member]

Debt Instrument [Line Items]

Interest rate

10.00%

Accrued interest

$ 100,000

$ 100,000

Term loan interest rate

7.00%

Debt instrument amount

$ 1,700,000

Proceeds from advance notes

$ 750,000

Maturity Date

Oct. 1, 2019

2019 Bridge Notes [Member] | November Bridge Notes [Member]

Debt Instrument [Line Items]

Interest rate

7.00%

Debt instrument amount

$ 350,000

Proceeds from advance notes

$ 3,000,000

Maturity Date

Dec. 31, 2019

Dec. 31, 2020

2019 Bridge Notes [Member] | November Bridge Notes [Member] | Cheval Holdings [Member]

Debt Instrument [Line Items]

Debt instrument amount

$ 250,000

2019 Bridge Notes [Member] | November Bridge Notes [Member] | Cameron Durrant [Member]

Debt Instrument [Line Items]

Debt instrument amount

$ 100,000

2019 Bridge Notes [Member] | Advance Notes [Member]

Debt Instrument [Line Items]

Proceeds from advance notes

950,000

2019 Bridge Notes [Member] | Nomis Bay LTD [Member]

Debt Instrument [Line Items]

Debt instrument amount

750,000

2019 Bridge Notes [Member] | Cameron Durrant [Member]

Debt Instrument [Line Items]

Debt instrument amount

750,000

2019 Bridge Notes [Member] | Chief Executive Officer [Member]

Debt Instrument [Line Items]

Debt instrument amount

$ 200,000

2019 Bridge Notes [Member] | Bona Fide Financing Transaction [Member]

Debt Instrument [Line Items]

Proceeds from advance notes

$ 3,000,000

Black Horse Capital, L.P [Member] | Convertible Promissory Note [Member]

Debt Instrument [Line Items]

Term loan interest rate

7.00%

Debt instrument amount

$ 2,500,000

2018 Convertible Notes Payable [Member] | Convertible Promissory Note [Member]

Debt Instrument [Line Items]

Accrued interest

$ 300,000

$ 200,000

2018 Convertible Notes Payable [Member] | Advance Notes [Member]

Debt Instrument [Line Items]

Common stock conversion price

$ 0.45

Intrinsic value of this beneficial conversion feature

$ 1,800,000

Debt discount amortization

$ 200,000

2019 Convertible Notes Payable [Member]

Debt Instrument [Line Items]

Term loan interest rate

7.50%

Debt instrument amount

$ 1,300,000

2019 Convertible Notes Payable [Member] | Convertible Promissory Note [Member]

Debt Instrument [Line Items]

Accrued interest

$ 100,000

100,000

2019 Convertible Notes Payable [Member] | Advance Notes [Member]

Debt Instrument [Line Items]

Common stock conversion price

$ 1.25

Intrinsic value of this beneficial conversion feature

$ 1,800,000

2020 Convertible Redeemable Notes [Member]

Debt Instrument [Line Items]

Interest rate

7.00%

Accrued interest

$ 1,600

Common stock conversion price

$ 0.25

Proceeds from convertible debt

$ 518,333

Percentage of conversion price

68.00%

Common stock closing price

$ 0.30

Interest expense

$ 4,000

Fair value of convertible notes

0

2020 Convertible Redeemable Notes [Member] | One Convertible Redeemable Promissory notes [Member]

Debt Instrument [Line Items]

Debt discount amortization

$ 33,000

Maturity Date

Mar. 13, 2021

Amount of Fixed monthly amortizing payments

$ 25,000

2020 Convertible Redeemable Notes [Member] | Two Convertible Redeemable Promissory notes [Member]

Debt Instrument [Line Items]

Debt discount amortization

$ 18,833

Maturity Date

Mar. 19, 2021

Amount of Fixed monthly amortizing payments

$ 14,250

2020 Convertible Notes Payable [Member] | Advance Notes [Member]

Debt Instrument [Line Items]

Remaining Discount Amortization Period

11 months

Notes Payable To Vendors [Member]

Debt Instrument [Line Items]

Interest rate

10.00%

Notes payable to vendors

$ 1,200,000

Accrued interest

$ 300,000

$ 300,000

Notes Payable To Vendors [Member] | 2019 Bridge Notes [Member]

Debt Instrument [Line Items]

Accrued interest

$ 1,100,000

Debt instrument amount

$ 500,000

Debt (Schedule of Maturities of

Debt (Schedule of Maturities of Debt) (Details) $ in Thousands	Mar. 31, 2020USD ($)
Debt Instrument [Line Items]
Total	$ 7,315
2020	6,027
2021	1,288
Principal payments on Notes payable to vendors [Member]
Debt Instrument [Line Items]
Total	774
2020	774
2021
Interest payments on Notes payable to vendors [Member]
Debt Instrument [Line Items]
Total	348
2020	348
2021
Principal payments on 2019 Bridge notes [Member]
Debt Instrument [Line Items]
Total	2,050
2020	2,050
2021
Interest payments on 2019 Bridge notes [Member]
Debt Instrument [Line Items]
Total	99
2020	99
2021
Principal payments on Convertible notes [Member]
Debt Instrument [Line Items]
Total	4,293
2020	3,018
2021	1,275
Interest payments on Convertible notes [Member]
Debt Instrument [Line Items]
Total	358
2020	270
2021	88
Gross debt before unamortized discount [Member]
Debt Instrument [Line Items]
Total	7,922
2020	6,559
2021	1,363
Unamortized debt discount on convertible debt [Member]
Debt Instrument [Line Items]
Total	607
2020	532
2021	$ 75

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Nov. 08, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued	200,000	500,000
Common stock, par value		$ 0.001	$ 0.001
Common share issued		114,034,451	114,311,790
Total proceeds	$ 100	$ 200	$ 65
Authorized shares of Common Stock		225,000,000	225,000,000
Equity Incentive Plan Twenty Twelve [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period expiration			10 years
Equity Incentive Plan Twenty Twelve [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Equity Incentive Plan Twenty Twelve [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Lincoln Park Capital Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued	700,000
Common stock, par value					$ 0.001
Value of right to sell number of shares					$ 20,000
Right to sell number of shares					100,000
Threshold prices but not to exceed in total proceeds					$ 750
Percentage of beneficially owning more than common stock outstanding					4.99%
Common share issued					706,592
Total proceeds	$ 300

Stockholders' Equity (Stock Opt

Stockholders' Equity (Stock Option Activity) (Details)	3 Months Ended
	Mar. 31, 2020$ / sharesshares
Options
Balance at the beginning of the period (in shares) | shares	15,881,721
Options granted (in shares) | shares	1,223,033
Options exercised (in shares) | shares
Options Cancelled (forfeited) (in shares) | shares
Options Cancelled (expired) (in shares) | shares	(105)
Balance at the end of the period (in shares) | shares	17,104,649
Weighted Average Exercise Price (Per Share)
Balance at the beginning of the period (in dollars per share) | $ / shares	$ 0.95
Options granted (in dollars per share) | $ / shares	0.40
Options Exercised (in dollars per share) | $ / shares
Options Cancelled (forfeited) (in dollars per share) | $ / shares
Options Cancelled (expired) (in dollars per share) | $ / shares	11.68
Balance at the ending of the period (in dollars per share) | $ / shares	$ 0.91

Stockholders' Equity (Weighted-

Stockholders' Equity (Weighted-Average Assumption) (Details)	3 Months Ended
	Mar. 31, 2020$ / shares
Expected term	5 years
Expected volatility	95.00%
Expected dividend yield	0.00%
Minimum [Member]
Exercise price	$ 0.38
Market value	$ 0.38
Risk-free interest rate	1.47%
Maximum [Member]
Exercise price	$ 0.40
Market value	$ 0.40
Risk-free interest rate	1.57%

Stockholders' Equity (Stock-Bas

Stockholders' Equity (Stock-Based Compensation Expense Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 265	$ 697
Unrecognized compensation expense	$ 700
Weighted average period for recognition	1 year 7 months 6 days
General And Administrative Expense [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 211	697
Research And Development Expense [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 54

License and Collaboration Agr_2

License and Collaboration Agreements (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	Jul. 19, 2019	May 30, 2019	Mar. 31, 2020
Mayo Agreement [Member]
Amount paid in license agreement			$ 200
Kite Agreement [Member]
Amount paid in license agreement		$ 8,000
Zurich Agreement [Member]
Amount paid in license agreement	$ 100
Zurich Agreement [Member] | Research And Development Expense [Member]
Amount paid in license agreement			$ 100

Savant Arrangements (Details)

Savant Arrangements (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended
	Jun. 30, 2016	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Jun. 30, 2017
Aggregate cost overages				$ 4,100	$ 3,400
Net of duductible					500
Due to Savant		$ 2,000	$ 2,000	$ 2,100	2,000
Savant Neglected Diseases, LLC [Member]
Number of shares called by warrant	200,000	100,000
Exercise price of warrant	$ 2.25	$ 2.25
Exercise period of warrant	5 years
Due from Savant					$ 1,400
Savant Neglected Diseases, LLC [Member] | Exercisable Immediately [Member]
Percentage of warrants exercisable	25.00%

Litigation (Details)

Litigation (Details) - Savant Neglected Diseases, LLC [Member] $ in Thousands	1 Months Ended
	Jun. 30, 2017USD ($)
Aggregate cost	$ 3,400
Deductible	500
Offset payment due	2,000
Amount owed	$ 1,400

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Apr. 02, 2020	Apr. 27, 2020	May 30, 2019	Mar. 31, 2020	Mar. 31, 2019	Aug. 31, 2018	May 05, 2020
Subsequent Event [Line Items]
Proceeds from convertible debt				$ 467,000
Issuance of common stock upon note conversions shares			2,179,622
Proceeds from advance notes						$ 900,000
Subsequent Event [Member] | 2020 Bridge Notes [Member]
Subsequent Event [Line Items]
Interest rate		7.00%
Debt instrument amount		$ 350,000
Maturity Date		Dec. 31, 2020
Subsequent Event [Member] | 2020 CARES Act [Member]
Subsequent Event [Line Items]
Interest rate							1.00%
Amount received under paycheck Protection Plan loan							$ 83,000
Subsequent Event [Member] | Cheval Holdings [Member] | 2020 Bridge Notes [Member]
Subsequent Event [Line Items]
Debt instrument amount		$ 100,000
Subsequent Event [Member] | Nomis Bay LTD [Member] | 2020 Bridge Notes [Member]
Subsequent Event [Line Items]
Debt instrument amount		$ 250,000
Non Qualified Financing [Member]
Subsequent Event [Line Items]
Proceeds from convertible debt				$ 10,000,000
Convertible Promissory Note [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from convertible debt	$ 4,300,000
Issuance of common stock upon note conversions shares	11,989,578
Convertible Promissory Note [Member] | Subsequent Event [Member] | Cheval Holdings [Member]
Subsequent Event [Line Items]
Issuance of common stock upon note conversions shares	1,583,333
Bona Fide Financing Transaction [Member] | Subsequent Event [Member] | 2020 Bridge Notes [Member]
Subsequent Event [Line Items]
Interest rate		10.00%
Proceeds from advance notes		$ 10,000,000