10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2021

Or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number: 001-36020

Onconova Therapeutics, Inc.

(Exact name of registrant as specified in its charter)

Delaware	22-3627252
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
12 Penns Trail, Newtown, PA	18940
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (267) 759-3680

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  ⌧ Yes  ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  ⌧ Yes  ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  ☐ Yes  ⌧ No

The number of outstanding shares of the registrant’s Common Stock, par value $0.01 per share, as of November 1, 2021 was 20,890,563.

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $.01 per share	ONTX	The Nasdaq Stock Market LLC

ONCONOVA THERAPEUTICS, INC.

TABLE OF CONTENTS FOR QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2021

	Page
PART I — FINANCIAL INFORMATION
Item 1. Financial Statements (Unaudited)	3
Condensed Consolidated Balance Sheets	3
Condensed Consolidated Statements of Operations	4
Condensed Consolidated Statements of Comprehensive Loss	5
Consolidated Statement of Stockholders’ Equity (Deficit)	6
Condensed Consolidated Statements of Cash Flows	7
Notes to Condensed Consolidated Financial Statements	8
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3. Quantitative and Qualitative Disclosures About Market Risk	33
Item 4. Controls and Procedures	33
PART II — OTHER INFORMATION
Item 1. Legal Proceedings	34
Item 1A. Risk Factors	34
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	34
Item 3. Defaults Upon Senior Securities	34
Item 4. Mine Safety Disclosures	34
Item 5. Other Information	34
Item 6. Exhibits	35
SIGNATURES	36

All common stock, equity, share and per share amounts have been retroactively adjusted to reflect a one-for-fifteen reverse stock split which was effective May 20, 2021.

2

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

Onconova Therapeutics, Inc.

Condensed Consolidated Balance Sheets

	September 30,		December 31,
	2021		2020
Assets	(unaudited)
Current assets:
Cash and cash equivalents	$	59,378,000	$	19,025,000
Receivables		29,000		37,000
Prepaid expenses and other current assets		529,000		722,000
Total current assets		59,936,000		19,784,000
Property and equipment, net		42,000		52,000
Other non-current assets		12,000		150,000
Total assets	$	59,990,000	$	19,986,000
Liabilities and stockholders’ equity
Current liabilities:
Accounts payable	$	4,050,000	$	4,833,000
Accrued expenses and other current liabilities		2,749,000		4,962,000
Deferred revenue		226,000		226,000
Total current liabilities		7,025,000		10,021,000
Warrant liability		—		321,000
Deferred revenue, non-current		3,299,000		3,469,000
Total liabilities		10,324,000		13,811,000
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value, 5,000,000 authorized at September 30, 2021 and December 31, 2020, none issued and outstanding at September 30, 2021 and December 31, 2020		—		—
Common stock, $0.01 par value, 125,000,000 and 250,000,000 authorized at September 30, 2021 and December 31, 2020, 20,890,563 and 12,396,219 shares issued and outstanding at September 30, 2021 and December 31, 2020		209,000		124,000
Additional paid in capital		490,418,000		434,593,000
Accumulated deficit		(440,955,000)		(428,556,000)
Accumulated other comprehensive income		(6,000)		14,000
Total stockholders’ equity		49,666,000		6,175,000
Total liabilities and stockholders’ equity	$	59,990,000	$	19,986,000

See accompanying notes to condensed consolidated financial statements.

3

Onconova Therapeutics, Inc.

Condensed Consolidated Statements of Operations (unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Revenue	$	57,000	$	66,000	$	170,000	$	174,000
Operating expenses:
General and administrative		2,284,000		2,147,000		7,351,000		6,548,000
Research and development		1,763,000		4,193,000		5,552,000		12,364,000
Total operating expenses		4,047,000		6,340,000		12,903,000		18,912,000
Loss from operations		(3,990,000)		(6,274,000)		(12,733,000)		(18,738,000)
Change in fair value of warrant liability		530,000		56,000		321,000		(63,000)
Other income (loss), net		7,000		(23,000)		13,000		73,000
Net loss	$	(3,453,000)	$	(6,241,000)	$	(12,399,000)	$	(18,728,000)
Net loss per share, basic and diluted	$	(0.22)	$	(0.52)	$	(0.80)	$	(1.65)
Basic and diluted weighted average shares outstanding		15,979,180		12,058,508		15,463,720		11,353,169

See accompanying notes to condensed consolidated financial statements.

4

Onconova Therapeutics, Inc.

Condensed Consolidated Statements of Comprehensive Loss (unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net loss	$	(3,453,000)	$	(6,241,000)	$	(12,399,000)	$	(18,728,000)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net		(8,000)		15,000		(20,000)		16,000
Other comprehensive (loss) income, net of tax		(8,000)		15,000		(20,000)		16,000
Comprehensive loss	$	(3,461,000)	$	(6,226,000)	$	(12,419,000)	$	(18,712,000)

See accompanying notes to condensed consolidated financial statements.

5

Onconova Therapeutics, Inc.

Consolidated Statement of Stockholders’ Equity (Deficit) (unaudited)

	Three Month Periods Ended September 30, 2021 and 2020
								Accumulated
				Additional				other
	Common Stock			Paid in		Accumulated		comprehensive
	Shares	Amount		Capital		deficit		(loss) income		Total
Balance at June 30, 2021	15,781,040	$	158,000	$	470,335,000	$	(437,502,000)	$	2,000	$	32,993,000
Net loss	—		—		—		(3,453,000)		—		(3,453,000)
Other comprehensive loss	—		—		—		—		(8,000)		(8,000)
Stock-based compensation	—		—		190,000		—		—		190,000
Issuance of common stock, net	5,109,523		51,000		19,893,000		—		—		19,944,000
Balance at September 30, 2021	20,890,563	$	209,000	$	490,418,000	$	(440,955,000)	$	(6,000)	$	49,666,000
Balance at June 30, 2020	11,611,830	$	116,000	$	431,420,000	$	(415,886,000)	$	(17,000)	$	15,633,000
Net loss	—		—		—		(6,241,000)		—		(6,241,000)
Other comprehensive loss	—		—		—		—		15,000		15,000
Stock-based compensation	—		—		90,000		—		—		90,000
Issuance of common stock upon exercise of warrants	691,389		7,000		2,711,000		—		—		2,718,000
Balance at September 30, 2020	12,303,219	$	123,000	$	434,221,000	$	(422,127,000)	$	(2,000)	$	12,215,000

	Nine Month Periods Ended September 30, 2021 and 2020
								Accumulated
				Additional				other
	Common Stock			Paid in		Accumulated		comprehensive
	Shares	Amount		Capital		deficit		income (loss)		Total
Balance at December 31, 2020	12,396,219	$	124,000	$	434,593,000	$	(428,556,000)	$	14,000	$	6,175,000
Net loss	—		—		—		(12,399,000)		—		(12,399,000)
Other comprehensive income	—		—		—		—		(20,000)		(20,000)
Exercise of stock options	4,642		—		24,000		—		—		24,000
Stock-based compensation	—		—		315,000		—		—		315,000
Shares issued in connection with reverse stock split	104		—		—		—		—		—
Issuance of common stock, net	8,329,598		83,000		55,008,000		—		—		55,091,000
Issuance of common stock upon exercise of warrants	160,000		2,000		478,000		—		—		480,000
Balance at September 30, 2021	20,890,563	$	209,000	$	490,418,000	$	(440,955,000)	$	(6,000)	$	49,666,000
Balance at December 31, 2019	7,411,157	$	74,000	$	414,917,000	$	(403,399,000)	$	(18,000)	$	11,574,000
Net loss	—		—		—		(18,728,000)		—		(18,728,000)
Other comprehensive loss	—		—		—		—		16,000		16,000
Stock-based compensation	—		—		275,000		—		—		275,000
Issuance of common stock, net	1,844,168		18,000		9,044,000		—		—		9,062,000
Issuance of common stock upon exercise of warrants	2,964,560		30,000		9,985,000		—		—		10,015,000
Issuance of common stock upon exercise of pre-funded warrants	83,334		1,000		—		—		—		1,000
Balance at September 30, 2020	12,303,219	$	123,000	$	434,221,000	$	(422,127,000)	$	(2,000)	$	12,215,000

See accompanying notes to condensed consolidated financial statements.

6

Onconova Therapeutics, Inc.

Condensed Consolidated Statements of Cash Flows (unaudited)

	Nine Months Ended September 30,
	2021		2020
Operating activities:
Net loss	$	(12,399,000)	$	(18,728,000)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		10,000		9,000
Change in fair value of warrant liabilities		(321,000)		63,000
Stock compensation expense		315,000		275,000
Changes in assets and liabilities:
Receivables		8,000		52,000
Prepaid expenses and other current assets		193,000		(107,000)
Other assets		138,000		—
Accounts payable		(783,000)		1,454,000
Accrued expenses and other current liabilities		(2,213,000)		(456,000)
Deferred revenue		(170,000)		(169,000)
Net cash used in operating activities		(15,222,000)		(17,607,000)
Investing activities:
Payments for purchase of property and equipment		—		(15,000)
Net cash used in investing activities		—		(15,000)
Financing activities:
Proceeds from the sale of common stock and warrants, net of costs		55,091,000		9,062,000
Proceeds from the exercise of warrants		480,000		10,016,000
Proceeds from the exercise of stock options		24,000		—
Net cash provided by financing activities		55,595,000		19,078,000
Effect of foreign currency translation on cash		(20,000)		16,000
Net increase in cash and cash equivalents		40,353,000		1,472,000
Cash and cash equivalents at beginning of period		19,025,000		22,726,000
Cash and cash equivalents at end of period	$	59,378,000	$	24,198,000

See accompanying notes to condensed consolidated financial statements.

7

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements

(Unaudited)

1. Nature of Business

The Company

Onconova Therapeutics, Inc. (the “Company”) was incorporated in the State of Delaware on December 22, 1998 and commenced operations on January 1, 1999. The Company’s headquarters are located in Newtown, Pennsylvania. The Company is a clinical-stage biopharmaceutical company focused on discovering and developing novel products for patients with cancer. The Company has proprietary targeted anti-cancer agents designed to disrupt specific cellular pathways that are important for cancer cell proliferation. The Company believes that the product candidates in its pipeline have the potential to be efficacious in a variety of cancers with unmet medical need. The Company has the following two clinical-stage programs: 1. narazaciclib (ON 123300), a multi-kinase inhibitor in solid tumors; and 2. oral rigosertib alone or in combination with PD-1 inhibitors for treatment of KRAS-mutated solid tumors. During 2012, Onconova Europe GmbH was established as a wholly owned subsidiary of the Company for the purpose of further developing business in Europe.

The Company has entered into several license and collaboration agreements. In 2011, the Company entered into a license agreement, as subsequently amended, with SymBio Pharmaceuticals Limited (“SymBio”), which grants SymBio certain rights to commercialize rigosertib in Japan and Korea. In December 2017, the Company entered into a license and collaboration agreement with HanX Biopharmaceuticals, Inc. (“HanX”) for the further development, registration and commercialization of narazaciclib in greater China. Narazaciclib is a preclinical compound which the Company believes has the potential to overcome the limitations of current generation CDK 4/6 inhibitors. Under the terms of the agreement, the Company received an upfront payment, and will receive regulatory and commercial milestone payments, as well as royalties on Chinese sales. The key feature of the collaboration is that HanX provides all funding required for Chinese IND enabling studies performed for Chinese Food and Drug Administration IND approval, which was received in January 2020. The Company and HanX also intended for these studies to comply with the FDA standards for IND approval. Accordingly, such studies were used by the Company for an IND filing with the US FDA in November 2020. The FDA Study May Proceed letter was issued in December 2020. The Company maintains global rights outside of China. On March 2, 2018, the Company entered into a License, Development and Commercialization Agreement (the “Pint License Agreement”) with Pint International SA (which, together with its affiliate Pint Pharma GmbH, are collectively referred to as “Pint”). Under the terms of the agreement, the Company granted Pint an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and commercialize any pharmaceutical product containing rigosertib in all uses of rigosertib in certain Latin American countries. In May 2019, the Company entered into a License and Collaboration Agreement (the “HanX License Agreement”) with HanX. Under the terms of the HanX License Agreement, the Company granted HanX an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and commercialize any pharmaceutical product (the “HanX Product”) containing rigosertib in all uses of rigosertib or the HanX Product in human therapeutic uses in the People’s Republic of China, Hong Kong, Macau and Taiwan (the “HanX Territory”). In connection with the HanX License Agreement, the Company also entered into a Securities Purchase Agreement with each of HanX and Abundant New Investments Ltd. (“Abundant”), an affiliate of HanX (each, a “Securities Purchase Agreement” and together, the “Securities Purchase Agreements”). HanX did not fulfill its obligations under the HanX License Agreement and in January 2020, in accordance with the terms of the HanX License Agreement, the HanX License Agreement was deemed to be void ab initio. Upon this termination, the rights to HanX Product in the HanX Territory reverted to the Company in accordance with the terms of the HanX License Agreement. In addition, the Securities Purchase Agreements terminated automatically effective upon the termination of the HanX License Agreement in accordance with the Securities Purchase Agreements. In November 2019, the Company entered into a Distribution, License and Supply Agreement (the “Knight License Agreement”) with Knight Therapeutics Inc. (“Knight”). Under the terms of the Knight License Agreement, the Company granted Knight (i) a non-exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and manufacture any product (the “Knight Licensed Product”) containing rigosertib for Canada (and Israel, should Knight exercise its option as set forth in the Knight License Agreement) (the “Knight Territory”) and in human uses (the

8

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

“Field”), and (ii) an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to commercialize the Knight Licensed Product in the Knight Territory and in the Field. Knight has also agreed to obtain from the Company all of its requirements of the Knight Licensed Products for the Knight Territory, and the Company has agreed to supply Knight with all of its requirements of the Knight Licensed Products. In December 2019, the Company entered into a Distribution, License and Supply Agreement (the “STA License Agreement”) with Specialised Therapeutics Asia Pte. Ltd. (“STA”). Under the terms of the STA License Agreement, the Company granted STA (i) a non-exclusive, royalty -bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and manufacture any product (the “STA Licensed Product”) containing rigosertib for Australia and New Zealand (the “STA Territory”) and in human uses (the “Field”), and (ii) an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know- how, to commercialize the STA Licensed Product in the STA Territory and in the Field. STA has also agreed to obtain from the Company all of its requirements of the STA Licensed Products for the STA Territory, and the Company has agreed to supply STA with all of its requirements of the STA Licensed Products.

On May 20, 2021, the Company amended its certificate of incorporation to effect a one-for-fifteen reverse stock split of its common stock. All common stock, equity, share and per share amounts in the financial statements and notes have been retroactively adjusted to reflect this one-for-fifteen reverse stock split.

On May 20, 2021, the Company amended its certificate of incorporation to decrease the number of authorized shares of common stock par value $0.01 per share from 250,000,000 to 125,000,000.

Liquidity

The Company has incurred recurring operating losses since inception. For the nine months ended September 30, 2021, the Company incurred a net loss of $12,399,000 and as of September 30, 2021 the Company had generated an accumulated deficit of $440,955,000. The Company anticipates operating losses to continue for the foreseeable future due to, among other things, costs related to research, development of its product candidates and its preclinical programs, strategic alliances and its administrative organization. At September 30, 2021, the Company had cash and cash equivalents of $59,378,000. The Company will require substantial additional financing to fund its ongoing clinical trials and operations, and to continue to execute its strategy.

On January 11, 2021, the Company closed on an offering of common stock. The Company issued 1,303,408 shares of common stock and net proceeds were approximately $8.5 million. On February 16, 2021, the Company closed on an offering of common stock. The Company issued 1,916,667 shares of common stock and net proceeds were approximately $26.7 million. On September 28, 2021, the Company closed on an offering of common stock. The Company issued 5,000,000 shares of common stock and net proceeds were approximately $19.5 million.

On August 20, 2021, the Company entered into an at-the-market equity distribution agreement for the sale of up to $25.0 million of common stock. Through September 30, 2021, the Company sold 109,523 shares under the agreement at a weighted average price of $5.32 per share. Net proceeds after commissions and offering expenses were approximately $0.5 million.

Following the unsuccessful conclusion of the INSPIRE trial, the Company has taken steps to reduce its cash expenditures. From September 2020 to December 2020, the Company implemented a workforce reduction of employees in research and development who were primarily focused on preparing the NDA for the use of rigosertib in higher risk MDS. In total, 10 employees were terminated, representing approximately 43% of the Company’s workforce. A severance related charge of approximately $1,207,000, which includes a non-cash charge of approximately $29,000 related to the accelerated vesting of outstanding stock options, was recorded in the year ended December 31, 2020. The accrued severance balance was included in accrued expenses and other liabilities on the balance sheet. It was paid in

9

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

periodic amounts through September 2021. On October 30, 2020, the Company notified its landlord of its intention to not renew its office space lease. The lease expired in February 2021 and was modified to a month-to-month lease for a portion of the space. The lease terminated in June 2021 and the Company has relocated to temporary office space with all employees working remotely.

The Company has and may continue to delay, scale-back, or eliminate certain of its research and development activities and other aspects of its operations until such time as the Company is successful in securing additional funding. The Company is exploring various dilutive and non-dilutive sources of funding, including equity financings, strategic alliances, business development and other sources. The future success of the Company is dependent upon its ability to obtain additional funding. There can be no assurance, however, that the Company will be successful in obtaining such funding in sufficient amounts, on terms acceptable to the Company, or at all. The Company believes that its cash and cash equivalents will be sufficient to fund its ongoing trials and business operations for more than twelve months from the date of this filing.

COVID-19

While the Company is not aware of a material impact from the novel coronavirus disease (“COVID-19”) pandemic through September 30, 2021, the full extent to which COVID-19 will directly or indirectly impact the Company’s business, results of operations and financial condition, including manufacturing, clinical trials and research and development costs, depends on future developments that are highly uncertain at this time.

2. Summary of Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) for interim financial information. Certain information and footnotes normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The financial statements include the consolidated accounts of the Company and its wholly-owned subsidiary, Onconova Europe GmbH. All significant intercompany transactions have been eliminated.

Unaudited Interim Financial Information

The accompanying condensed consolidated balance sheet as of September 30, 2021, the condensed consolidated statements of operations and comprehensive loss for the three and nine months ended September 30, 2021 and 2020, the consolidated statements of stockholders’ equity (deficit) for the three and nine months ended September 30, 2021 and 2020 and the condensed consolidated statements of cash flows for the nine months ended September 30, 2021 and 2020 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of September 30, 2021, the results of its operations for the three and nine months ended September 30, 2021 and 2020, and its cash flows for the nine months ended September 30, 2021 and 2020. The financial data and other information disclosed in these notes related to the three and nine months ended September 30, 2021 and 2020 are unaudited. The results for the three and nine months ended September 30, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021, any other interim periods, or any future year or period. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the year ended December 31, 2020 included in the Company’s annual report on Form 10-K filed with the SEC on March 18, 2021.

10

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

All common stock, equity, share and per share amounts in the financial statements and notes have been retroactively adjusted to reflect a one-for-fifteen reverse stock split which was effective May 20, 2021.

Segment Information

Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company views its operations and manages its business in one segment, which is the identification and development of oncology therapeutics.

Significant Accounting Policies

The Company’s significant accounting policies are disclosed in the audited consolidated financial statements for the year ended December 31, 2020 included in the Company’s annual report on Form 10-K filed with the SEC on March 18, 2021. Since the date of such financial statements, there have been no changes to the Company’s significant accounting policies.

Fair Value Measurements

The carrying amounts reported in the accompanying consolidated financial statements for cash and cash equivalents, accounts payable, and accrued liabilities approximate their respective fair values because of the short-term nature of these accounts. The fair value of the warrant liability is discussed in Note 7, “Fair Value Measurements.”

Recent Accounting Pronouncements

In June 2016, the FASB issued new guidance on the accounting for credit losses on financial instruments. The guidance was amended in November 2019. The new guidance introduces an expected loss model for estimating credit losses, replacing the incurred loss model. The new guidance also changes the impairment model for available-for-sale debt securities, requiring the use of an allowance to record estimated credit losses (and subsequent recoveries). The guidance is effective for the Company in fiscal years beginning after December 15, 2022, and interim periods within those years, with early adoption permitted. The Company is evaluating the impact of the adoption of the standard on its consolidated financial statements.

3. Revenue

The Company’s revenue during the three and nine months ended September 30, 2021 and 2020 was from its license and collaboration agreement with SymBio.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Symbio
Upfront license fee recognition over time	$	57,000	$	56,000	$	170,000	$	169,000
Supplies		—		10,000		—		5,000
	$	57,000	$	66,000	$	170,000	$	174,000

11

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

Deferred revenue is as follows:

	Symbio
	Upfront Payment
Deferred balance at December 31, 2020	$	3,695,000
Recognition to revenue		170,000
Deferred balance at September 30, 2021	$	3,525,000

4. Net Loss Per Share of Common Stock

The following potentially dilutive securities outstanding at September 30, 2021 and 2020 have been excluded from the computation of diluted weighted average shares outstanding, as they would be antidilutive (reflects the number of common shares as if the dilutive securities had been converted to common stock):

	September 30,
	2021	2020
Warrants	496,586	766,091
Stock options	438,006	66,933
	934,592	833,024

5. Warrants

Common Stock warrants are accounted for in accordance with applicable accounting guidance provided in ASC Topic 815, Derivatives and Hedging - Contracts in Entity’s Own Equity (ASC Topic 815), as either derivative liabilities or as equity instruments depending on the specific terms of the warrant agreement. Some of the Company’s warrants are classified as liabilities because in certain circumstances they could require cash settlement.

Warrants outstanding and warrant activity (reflects the number of common shares as if the warrants were converted to common stock) for the nine months ended September 30, 2021 is as follows:

					Balance				Balance
		Exercise		Expiration	December 31,	Warrants	Warrants	Warrants	September 30,
Description	Classification	Price		Date	2020	Issued	Exercised	Expired	2021
Non-tradable warrants	Liability	$	2,587.50	July 2021	430	—	—	(430)	—
Tradable warrants	Liability	$	1,107.00	July 2021	14,187	—	—	(14,187)	—
Non-tradable pre-funded warrants	Equity	$	2.25	July 2023	26	—	—	—	26
Non-tradable warrants	Equity	$	24.00	December 2022	26,189	—	—	—	26,189
Non-tradable warrants	Equity	$	211.50	March 2021	333	—	—	(333)	—
Non-tradable warrants	Equity	$	317.25	March 2021	556	—	—	(556)	—
Non-tradable warrants	Equity	$	116.8425	June 2021	1,000	—	—	(1,000)	—
Non-tradable pre-funded warrants	Equity	$	2.25	none	3,522	—	—	—	3,522
Non-tradable warrants	Equity	$	24.00	December 2022	120,407	—	—	—	120,407
Non-tradable pre-funded warrants	Equity	$	2.25	none	4,974	—	—	—	4,974
Non-tradable warrants	Equity	$	30.00	September 2023	7,306	—	—	—	7,306
Non-tradable warrants	Equity	$	3.00	November 2024	409,500	—	(160,000)	—	249,500
Non-tradable warrants	Equity	$	6.54375	December 2024	16,953	—	—	—	16,953
Non-tradable warrants	Equity	$	6.75450	December 2024	46,263	—	—	—	46,263
Non-tradable warrants	Equity	$	6.77850	December 2023	29,968	—	—	—	29,968
					681,614	—	(160,000)	(16,506)	505,108

12

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

6. Balance Sheet Detail

Prepaid expenses and other current assets:

	September 30,		December 31,
	2021		2020
Research and development	$	22,000	$	189,000
Manufacturing		158,000		90,000
Insurance		252,000		263,000
Other		97,000		180,000
	$	529,000	$	722,000

Property and equipment:

	September 30,		December 31,
	2021		2020
Property and equipment	$	70,000	$	70,000
Accumulated depreciation		(28,000)		(18,000)
	$	42,000	$	52,000

Accrued expenses and other current liabilities:

	September 30,		December 31,
	2021		2020
Research and development	$	1,750,000	$	2,541,000
Employee compensation		888,000		2,239,000
Professional fees		111,000		182,000
	$	2,749,000	$	4,962,000

7. Fair Value Measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The Company utilizes a valuation hierarchy for disclosure of the inputs to the valuations used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the Company’s own assumptions used to measure assets and liabilities at fair value. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

On January 5, 2016, the Company entered into a securities purchase agreement (the “Securities Purchase Agreement”) with an institutional investor providing for the issuance and sale by the Company of 861 shares of Common Stock, at a purchase price of $2,137.50 per share and warrants to purchase up to 430 shares of Common Stock (the “Warrants”) for aggregate gross proceeds of $1,840,000. The Company classified the warrants as a liability (see Note 5). The estimated fair value using the Black-Scholes pricing model was approximately $0 at September 30, 2021 and December 31, 2020. These warrants expired in July 2021.

13

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

On July 29, 2016 the Company closed on a Rights Offering, issuing 16,000 shares of Common Stock, 14,187 Tradable Warrants and 2,918 Pre-Funded Warrants. The Tradable Warrants were exercisable for a period of five years for one share of Common Stock at an exercise price of $1,107 per share. The Company classified the Tradable Warrants as a liability (see Note 5). The Tradable Warrants were listed on the Nasdaq Capital Market. The Company determined that an active and orderly market for the Tradable Warrants developed and that the Nasdaq Capital Market price was the best indicator of fair value of the warrant liability. The quoted market price was used to determine the fair value at December 31, 2020. These warrants expired in July 2021.

The following fair value hierarchy table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020:

	Fair Value Measurement as of:
	September 30, 2021								December 31, 2020
	Level 1		Level 2		Level 3		Balance		Level 1		Level 2		Level 3		Balance
Tradable warrants liability	$	—	$	—	$	—	$	—	$	321,000	$	—	$	—	$	321,000
Non-tradable warrants liability		—		—		—		—		—		—		—		—
Total	$	—	$	—	$	—	$	—	$	321,000	$	—	$	—	$	321,000

There were no transfers between levels in any of the periods reported.

8. Stock-Based Compensation

The 2018 Omnibus Incentive Compensation Plan (the “2018 Plan”) was unanimously approved by the Company’s Board of Directors on May 24, 2018 and was approved by the Company’s stockholders on June 27, 2018.

Under the 2018 Plan, the Company may grant incentive stock options, non-qualified stock options, stock awards, stock units, stock appreciation rights and other stock-based awards to employees, non-employee directors and consultants, and advisors. The maximum aggregate number of shares of the Company’s common stock that may be issued under the 2018 Plan is 26,823.

The 2018 Plan was amended and restated following unanimous approval of the Company’s Board of Directors on April 24, 2019 and was approved by the Company’s shareholders on June 17, 2019. The amended 2018 Plan (the “Amended Plan”) allowed for an additional 39,300 shares of the Company’s common stock that may be issued under the Amended Plan with respect to awards made on and after June 17, 2019.

The 2021 Incentive Compensation Plan (the “2021 Plan”) was unanimously approved by the Company’s shareholders on July 30, 2021. Upon stockholders’ approval of the 2021 Plan, no further awards will be made under the amended 2018 Plan. Under the 2021 Plan, the Company may grant incentive stock options, non-qualified stock options, stock awards, stock units, stock appreciation rights and other stock-based awards to employees, non-employee directors and consultants, and advisors. The maximum aggregate number of shares of the Company’s common stock that may be issued under the 2021 Plan is 1,300,000. At September 30, 2021, there were 917,094 shares available for future issuance.

Stock-based compensation expense includes stock options granted to employees and non-employees and has been reported in the Company’s statements of operations and comprehensive loss in either research and development expenses or general and administrative expenses depending on the function performed by the optionee. No net tax benefits related to the stock-based compensation costs have been recognized since the Company’s inception. The

14

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

Company recognized stock-based compensation expense related to stock options and restricted stock units as follows for the three and nine months ended September 30, 2021 and 2020:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
General and administrative	$	153,000	$	51,000	$	270,000	$	142,000
Research and development		29,000		39,000		45,000		133,000
	$	182,000	$	90,000	$	315,000	$	275,000

A summary of stock option activity for the nine months ended September 30, 2021 is as follows:

		Options Outstanding
					Weighted
			Weighted-		Average
	Shares		Average		Remaining	Aggregate
	Available	Number	Exercise		Contractual	Intrinsic
	for Grant	of Shares	Price		Term (in years)	Value
Balance, December 31, 2020	12,339	57,939	$	368.10	8.38	$	—
Authorized	1,300,000	—
Granted	(398,575)	398,575	$	5.29	9.83		—
Exercised	—	(4,642)	$	4.65	8.47	$	21,636
Forfeitures	3,330	(13,866)	$	940.63	7.11
Balance, September 30, 2021	917,094	438,006	$	21.55	9.65	$	—
Vested or expected to vest, September 30, 2021		420,868	$	21.55	9.65	$	—
Exercisable at September 30, 2021		24,261	$	297.34	7.62	$	—

The Company accounts for all stock-based payments made to employees, non-employees and directors using an option pricing model for estimating fair value. Accordingly, stock-based compensation expense is measured based on the estimated fair value of the awards on the date of grant, net of forfeitures. Compensation expense is recognized for the portion that is ultimately expected to vest over the period during which the recipient renders the required services to the Company using the straight-line single option method.

The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock options at the grant date. The Black-Scholes model requires the Company to make certain estimates and assumptions, assumptions related to the expected price volatility of the Common Stock, the period during which the options will be outstanding, the rate of return on risk-free investments and the expected dividend yield for the Company’s stock.

As of September 30, 2021, there was $1,897,000 of unrecognized compensation expense related to the unvested stock options which is expected to be recognized over a weighted-average period of approximately 2.24 years.

The weighted-average assumptions underlying the Black-Scholes calculation of grant date fair value include the following:

	Nine months ended September 30,
	2021			2020
Risk-free interest rate		0.89	%		0.44	%
Expected volatility		133.83	%		106.38	%
Expected term		5.93	years		6.00	years
Expected dividend yield		0	%		0	%
Weighted average grant date fair value	$	4.59		$	3.75

15

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

The weighted-average valuation assumptions were determined as follows:

● Risk-free interest rate: The Company based the risk-free interest rate on the interest rate payable on U.S. Treasury securities in effect at the time of grant for a period that is commensurate with the assumed expected option term.

● Expected term of options: Due to its lack of sufficient historical data, the Company estimates the expected life of its employee stock options using the “simplified” method, as prescribed in Staff Accounting Bulletin (SAB) No. 107, whereby the expected life equals the arithmetic average of the vesting term and the original contractual term of the option.

● Expected stock price volatility: Expected volatility is based on the historical volatility of the Company’s Common Stock since its IPO in July 2013.

● Expected annual dividend yield: The Company has never paid, and does not expect to pay, dividends in the foreseeable future. Accordingly, the Company assumed an expected dividend yield of 0.0%.

● Estimated forfeiture rate: The Company’s estimated annual forfeiture rate on stock option grants was 4.14% in 2021 and 2020, based on the historical forfeiture experience.

On August 2, 2021, the compensation committee of the board of directors approved restricted stock unit grants to the Company’s employees (“2021 RSU”). An aggregate of 104,700 service-based RSUs were issued at a grant date fair value of $5.19. The 2021 RSU awards will be settled in stock, vest 33% on each of the the first and second anniversary of the date of grant, and vest 34% on the third anniversary of the date of grant. The 2021 RSU awards were granted under the 2021 Plan. There were no vesting events, expirations, forfeitures, or cancelations of the 2021 RSUs during the period. At September 30, 2021, the unrecognized compensation cost related to unvested service-based RSUs was $513,000, which will be recognized over the remaining service period. During the nine months ended September 30, 2021, the Company recognized $30,000 of stock-based compensation expense related to the 2021 RSUs, which is included in additional paid-in capital.

Grants of PSUs and SARs

On July 9, 2020, the compensation committee of the board of directors and the board approved a cash bonus program of cash-settled stock appreciation right (“2020 SAR”) awards and cash-settled performance stock unit (“2020 PSU”) awards to the Company’s employees. An aggregate of 2020 SAR awards with respect to 256,713 shares of common stock and 2020 PSU awards with respect to 124,220 shares of common stock were granted to the Company’s employees. The 2020 SAR awards will be settled in cash, vest 33% on the first anniversary of the date of grant, and the remaining 67% monthly over the next 24 months, have a per-share base amount of $8.40, which was the closing sales price of a share of the Company’s common stock on the grant date, and are in all cases subject to the terms and conditions of the Company’s form of SAR award agreement. The 2020 SAR awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

16

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

The 2020 PSU awards vest 50% upon the submission of a new drug application (“NDA”) to the U.S. FDA for rigosertib in higher-risk myelodysplastic syndromes (“HR-MDS”) and 50% upon U.S. FDA approval of rigosertib for HR-MDS. The 2020 PSU awards have a maximum value of $21.60 per share. The maximum price per share is the per-share value based on the Company’s market capitalization at $250 million and the Company’s outstanding shares of common stock, which was 11,611,829 shares on July 9, 2020. In all cases, the 2020 PSU awards are subject to the terms and conditions of the Company’s form of PSU award agreement. The 2020 PSU awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

In addition, on July 9, 2020, based on the recommendation of the compensation committee, the board approved a change in the non-employee director compensation policy that would provide for an annual SAR award (“2020 Director SAR”) with respect to 8,333 shares of common stock for each of the Company’s non-employee directors. No other changes to the non-employee director compensation policy were approved and, on July 9, 2020, the Board approved the initial 8,333 2020 Director SAR award to each of the non-employee directors for an aggregate total of 58,333 2020 Directors SAR awards granted. The 2020 Director SAR awards vest on the first anniversary of grant subject to the director’s continued service and will be settled in cash, have a per-share base amount of $8.40, and are in all cases subject to the terms and conditions of the Company’s form of 2020 Director SAR award agreement.

Each SAR subject to a 2020 SAR award represents the right to a cash payment equal to the excess, if any, of (i) the fair market value of each underlying share of the Company’s common stock, determined on the date of exercise of the SAR minus (ii) the base amount. Pursuant to the terms of the SAR awards, in no event may the cash payment for each SAR exceed $13.20, which is the maximum price per share of $21.60, minus the base amount of $8.40, subject to adjustment in accordance with the terms of the Stock Appreciation Right Award Agreement. The maximum price per share is the per-share value based on the Company’s market capitalization at $250 million and the Company’s outstanding shares of common stock, which was 11,611,829 shares on July 9, 2020.

On February 17, 2021, the compensation committee of the board of directors and the board approved a cash bonus program of cash-settled stock appreciation right (“2021 SAR”) awards and cash-settled performance stock unit (“2021 PSU”) awards to the Company’s employees. An aggregate of 2021 SAR awards with respect to 100,000 shares of common stock and 2021 PSU awards with respect to 100,000 shares of common stock were granted to the Company’s employees. The 2021 SAR awards will be settled in cash, vest 33% on the first anniversary of the date of grant, and the remaining 67% monthly over the next 24 months, have a per-share base amount of $22.65, which was the closing sales price of a share of the Company’s common stock on the grant date, and are in all cases subject to the terms and conditions of the Company’s form of SAR award agreement. Each SAR subject to a 2021 SAR award represents the right to a cash payment equal to the excess, if any, of (i) the fair market value of each underlying share of the Company’s common stock, determined on the date of exercise of the 2021 SAR minus (ii) the base amount. Pursuant to the terms of the 2021 SAR awards, in no event may the cash payment for each SAR exceed $15.45, which is the maximum price per share of $38.10, minus the base amount of $22.65, subject to adjustment in accordance with the terms of the Stock Appreciation Right Award Agreement. The maximum price per share is the per-share value based on the Company’s market capitalization at $600 million and the Company’s outstanding shares of common stock, which was 15,767,492 shares on February 17, 2021. The 2021 SAR awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

The 2021 PSU awards vest 20% upon the initiation of a new clinical program with an in-licensed compound, 20% for reaching the recommended Phase 2 dose for any compound, 20% for the first patient enrolled in the expansion cohort of the Phase 1 ON123300 clinical trial, 20% for the first patient enrolled in a registrational study for any compound, and 20% for the topline data of a registrational study for any compound. The 2021 PSU awards have a maximum value of $38.10 per share. The maximum price per share is the per-share value based on the Company’s approximate market capitalization at $600 million and the Company’s outstanding shares of common stock, which was 15,767,492 shares on February 17, 2021. In all cases, the 2021 PSU awards are subject to the terms and conditions of

17

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

the Company’s form of PSU award agreement. The 2021 PSU awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

The fair value of the 2021 SARs granted has been estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions:

	Nine months ended
	September 30, 2021
Risk-free interest rate		0.95	%
Expected volatility		129.79	%
Expected term		6.5 years
Expected dividend yield		0	%
Weighted average grant date fair value	$	0.62

During the nine months ended September 30, 2021, the Company recognized $528,000 of compensation expense related to the SARs and PSUs. Included in compensation expense related to SARs is $442,000 of expense resulting from the exercise of 2020 SARs during February 2021. As of September 30, 2021, the SARs and PSUs liability was $86,000 and is included in accrued expenses. As of September 30, 2021, there was $28,000 of unrecognized compensation cost related to the 2020 SARs and PSUs and $350,000 of unrecognized compensation cost related to the 2021 SARs and PSUs.

9. Research Agreements

The Company has entered into various licensing and right-to-sublicense agreements with educational institutions for the exclusive use of patents and patent applications, as well as any patents that may develop from research being conducted by such educational institutions in the field of anticancer therapy, genes and proteins. Results from this research have been licensed to the Company pursuant to these agreements. Under one of these agreements with Temple University (“Temple”), the Company is required to make annual maintenance payments to Temple and royalty payments based upon a percentage of sales generated from any products covered by the licensed patents, with minimum specified royalty payments. As no sales had been generated through September 30, 2021 under the licensed patents, the Company has not incurred any royalty expenses related to this agreement. In addition, the Company is required to pay Temple a percentage of any sublicensing fees received by the Company.

10. Related-Party Transactions

The Company entered into a research agreement, as subsequently amended, with the Mount Sinai School of Medicine (“Mount Sinai”), with which a former member of its board of directors and a stockholder is affiliated. The agreement expired in June 2020 and was not renewed. The board member left the Company’s board in August 2020. Mount Sinai is undertaking research on behalf of the Company on the terms set forth in the agreements. Mount Sinai, in connection with the Company, will prepare applications for patents generated from the research. Results from all projects will belong exclusively to Mount Sinai, but the Company will have an exclusive option to license any inventions. Payments to Mount Sinai under this research agreement for both the three months ended September 30, 2021 and 2020 were $0, and for the nine months ended September 30, 2021 and 2020 were $0 and $201,000, respectively. At both September 30, 2021 and December 31, 2020, the Company had $77,000 payable to Mount Sinai under this agreement.

18

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

11. Securities Registrations and Sales Agreements

January 2020 Offering

On December 31, 2019, the Company entered into definitive securities purchase agreements with institutional investors for the issuance and sale in a registered direct offering of 1,844,168 shares of the Company's common stock at an offering price of $5.4225 per share.

Pursuant to the December 2019 HCW Engagement Letter, HCW agreed to serve as exclusive placement agent for the offering. In connection with the offering, the Company paid HCW an aggregate cash fee equal to 7.0% of the gross proceeds in the offering, management fee equal to 1.0% of the gross proceeds raised in the offering, $85,000 for non-accountable expenses; and $10,000 for clearing fees. The Company also issued to HCW or its designees placement agent warrant to purchase up to 92,208 shares of common stock at an exercise price of $6.7785 per share. The placement agent warrants are immediately exercisable and will expire on December 31, 2023.

The net proceeds to the Company from the offering, after deducting HCW's placement agent fees and expenses and other estimated offering expenses payable by the Company were approximately $9.0 million and were received in January 2020.

The offering was pursuant to a prospectus dated December 28, 2017, and a prospectus supplement dated as of December 31, 2019 filed in connection with a takedown from the Company's shelf registration statement on Form S-3 (File No. 333-221684). The offering closed on January 3, 2020.

January 7, 2021 Offering

On January 7, 2021, the Company entered into a purchase agreement with certain institutional and accredited investors for the sale of an aggregate of 1,303,408 shares of the Company’s common stock, at a purchase price of $6.675 per share.

Under the purchase agreement, subject to certain exceptions, the Company is prohibited from effecting or entering into an agreement to effect any “variable rate transactions” as defined in the purchase agreement for a period of five years following the closing of the offering.

In connection with the offering, pursuant to the purchase agreement we reimbursed Lincoln Park Capital Fund, LLC, as the lead investor (“Lincoln Park”), an aggregate of $100,000 for expenses incurred in connection with the offering, including any due diligence expenses and legal fees. Furthermore, pursuant to the purchase agreement, we have granted Lincoln Park certain rights to participate at fair value with other investors in up to 50% of the amount of any future offerings of common stock or securities exercisable for or convertible into common stock that the Company seeks to complete within one year after the closing of the offering, other than a firm commitment public offering.

The net proceeds to the Company from the offering, after deducting Lincoln Park’s expenses and other estimated offering expenses payable by the Company were approximately $8.5 million.

The shares sold in the offering were offered and sold by the Company directly to the investors, without a placement agent, underwriter, broker or dealer, pursuant to an effective shelf registration statement on Form S-3 (File No. 333-237844) declared effective by the SEC on May 18, 2020, and the base prospectus contained therein. The offering closed on January 11, 2021.

19

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

February 10, 2021 Offering

On February 10, 2021, the Company entered into an underwriting agreement with Guggenheim Securities, LLC, as representative of several underwriters, for the public offering of 1,666,667 shares of the Company’s common stock, at a public offering price of $15.00 per share. Under the terms of the underwriting agreement, the Company granted the underwriters an option, exercisable for 30 days, to purchase up to an additional 250,000 shares of common stock at the same price. The option was exercised prior to closing.

In connection with the offering, the Company paid the underwriters a cash fee equal to 6% of the gross proceeds in the offering and $100,000 in legal fees and expenses.

The net proceeds to the Company from the offering, including exercise of the underwriters’ option, were approximately $26.7 million, after deducting fees and estimated offering expenses payable by the Company.

The offering was made pursuant to a registration statement (No. 333-237844) on Form S-3, which was initially filed by the Company with the SEC on April 24, 2020, amended on Form S-3/A that was filed with the SEC on May 15, 2020, and was declared effective by the SEC on May 18, 2020. The offering closed on February 16, 2021.

August 20, 2021

On August 20, 2021, the Company entered into an Equity Distribution Agreement (the “Equity Distribution Agreement”) with Piper Sandler & Co. (“Piper Sandler”) under which the Company may offer and sell, from time to time at its sole discretion, shares of the Company’s common stock, with aggregate gross sales proceeds of up to $25.0 million through an “at the market” equity offering program under which Piper Sandler is the sales agent.

Under the Equity Distribution Agreement, the Company has the right to set the parameters for the sale of shares, including the number of shares to be issued, the time period during which sales are requested to be made, limitations on the number of shares that may be sold in any one trading day and any minimum price below which sales may not be made. Subject to the terms and conditions of the Equity Distribution Agreement, Piper Sandler may sell the shares by methods deemed to be an “at the market” offering as defined in Rule 415 promulgated under the Securities Act of 1933, as amended, including sales made through The Nasdaq Capital Market or any other trading market for our common stock. The Equity Distribution Agreement provides that Piper Sandler is entitled to compensation for its services equal to 3.0% of the gross proceeds of any shares of common stock sold through Piper Sandler under the Equity Distribution Agreement. The Company has no obligation to sell any shares under the Equity Distribution Agreement, and may at any time suspend solicitation and offers under the Equity Distribution Agreement. Through September 30, 2021, the Company sold 109,523 shares under the agreement at a weighted average price of $5.32 per share. Net proceeds after commissions and offering expenses were approximately $0.5 million.

The shares are issued pursuant to the Company’s shelf registration statement on Form S-3 (File No. 333-237844). The Company filed a prospectus supplement, dated August 20, 2021 with the Securities and Exchange Commission in connection with the offer and sale of the shares pursuant to the Equity Distribution Agreement.

September 23, 2021 Offering

On September 23, 2021, the Company entered into an underwriting agreement with Guggenheim Securities, LLC, as representative of several underwriters, for the public offering of 5,000,000 shares of the Company’s common stock, at a public offering price of $4.20 per share. Under the terms of the underwriting agreement, the Company granted the underwriters an option, exercisable for 30 days, to purchase up to an additional 750,000 shares of common stock at the same price. The option was not exercised.

20

Onconova Therapeutics, Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

In connection with the offering, the Company paid the underwriters a cash fee equal to 6% of the gross proceeds in the offering and $100,000 in legal fees and expenses.

The net proceeds to the Company from the offering, including exercise of the underwriters’ option, were approximately $19.5 million, after deducting fees and estimated offering expenses payable by the Company.

The offering was made pursuant to a registration statement (No. 333-237844) on Form S-3, which was initially filed by the Company with the SEC on April 24, 2020, amended on Form S-3/A that was filed with the SEC on May 15, 2020, and was declared effective by the SEC on May 18, 2020. The offering closed on September 28, 2021.

21

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with interim unaudited condensed consolidated financial statements contained in Part I, Item 1 of this quarterly report, and the audited consolidated financial statements and notes thereto for the year ended December 31, 2020 and the related Management’s Discussion and Analysis of Financial Condition and Results of Operations, both of which are contained in our annual report on Form 10-K filed with the SEC on March 18, 2021. As used in this report, unless the context suggests otherwise, “we,” “us,” “our,” “the Company” or “Onconova” refer to Onconova Therapeutics, Inc. and its consolidated subsidiaries.

All common stock, equity, share and per share amounts have been retroactively adjusted to reflect a one-for-fifteen reverse stock split which was effective May 20, 2021.

Cautionary Note Regarding Forward-Looking Statements

This quarterly report on Form 10-Q includes forward-looking statements. We may, in some cases, use terms such as “believes,” “estimates,” “anticipates,” “expects,” “plans,” “intends,” “may,” “could,” “might,” “will,” “should,” “approximately” or other words that convey uncertainty of future events or outcomes to identify these forward-looking statements. Forward-looking statements appear in a number of places throughout this report and include statements regarding our intentions, beliefs, projections, outlook, analyses or current expectations concerning, among other things, our ongoing and planned preclinical development and clinical trials, the timing of and our ability to make regulatory filings and obtain and maintain regulatory approvals for our product candidates, protection of our intellectual property portfolio, the degree of clinical utility of our products, particularly in specific patient populations, our ability to develop commercial and manufacturing functions, expectations regarding clinical trial data, our results of operations, cash needs, financial condition, liquidity, collaborations, partnerships, prospects, growth and strategies, the industry in which we operate and the trends that may affect the industry or us.

By their nature, forward-looking statements involve risks and uncertainties because they relate to events, competitive dynamics and industry change, and depend on the economic circumstances that may or may not occur in the future or may occur on longer or shorter timelines than anticipated. Although we believe that we have a reasonable basis for each forward-looking statement contained in this report, we caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and the development of the industry in which we operate may differ materially from the forward-looking statements contained in this report. In addition, even if our results of operations, financial condition and liquidity, and events in the industry in which we operate are consistent with the forward-looking statements contained in this report, they may not be predictive of results or developments in future periods.

Actual results could differ materially from our forward-looking statements due to a number of factors, including risks related to:

●our need for additional financing for our clinical-stage programs, continued product development and other operations, and our ability to obtain sufficient funds on acceptable terms when needed, and our plans and future needs to scale back operations if adequate financing is not obtained;

●our estimates regarding expenses, future revenues, capital requirements and needs for additional financing;

●the success and timing of our preclinical studies and clinical trials, including site initiation and patient enrollment, and regulatory approval of protocols for future clinical trials;

●our ability to enter into, maintain and perform collaboration agreements with other pharmaceutical companies, for funding and commercialization of our clinical product candidates or preclinical compounds, and our ability to achieve certain milestones under those agreements;

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●the difficulties in obtaining and maintaining regulatory approval of our product candidates, and the labeling under any approval we may obtain;

●our plans and ability to develop, manufacture and commercialize our product candidates;

●our failure to recruit or retain key scientific or management personnel or to retain our executive officers;

●the size and growth of the potential markets for our product candidates and our ability to serve those markets;

●regulatory developments in the United States and foreign countries;

●the rate and degree of market acceptance of any of our product candidates;

●obtaining and maintaining intellectual property protection for our product candidates and our proprietary technology;

●the successful development of our commercialization capabilities, including sales and marketing capabilities;

●recently enacted and future legislation and regulation regarding the healthcare system;

●the success of competing therapies and products that are or become available;

●our ability to maintain the listing of our securities on a national securities exchange;

●the potential for third party disputes and litigation;

●the performance of third parties, including contract research organizations (“CROs”) and third-party manufacturers; and

●the impact of the novel coronavirus disease, COVID-19, to global economy and capital markets, and to our business and our financial results.

Any forward-looking statements that we make in this report speak only as of the date of such statement, and we undertake no obligation to update such statements to reflect events or circumstances after the date of this report or to reflect the occurrence of unanticipated events. Comparisons of results for current and any prior periods are not intended to express any future trends or indications of future performance, unless expressed as such, and should only be viewed as historical data.

You should also read carefully the factors described in the “Risk Factors” in our most recent annual report on Form 10-K and quarterly reports on Form 10-Q, to better understand significant risks and uncertainties inherent in our business and underlying any forward-looking statements. As a result of these factors, actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements in this report and you should not place undue reliance on any forward-looking statements.

Overview

We are a clinical-stage biopharmaceutical company focused on discovering and developing novel products for patients with cancer. We have proprietary targeted anti-cancer agents designed to disrupt specific cellular pathways that are important for cancer cell proliferation. We believe that the product candidates in our pipeline have the potential to be efficacious in a variety of cancers with unmet medical need. We have the following two clinical-stage programs: 1. narazaciclib (ON 123300), a multi-kinase inhibitor in solid tumors; and 2. rigosertib administered alone or in combination with PD-1 inhibitors for treatment of solid tumors. We are currently evaluating potential compounds for in-licensing opportunities.

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Our net losses were $12.4 million and $18.7 million for the nine months ended September 30, 2021 and 2020, respectively. As of September 30, 2021, we had an accumulated deficit of $441.0 million. We expect to incur significant expenses and operating losses for the foreseeable future as we continue the development of, and seek regulatory approval for, our product candidates, even if milestones under our license and collaboration agreements may be met. As of September 30, 2021, we had $59.4 million in cash and cash equivalents.

On January 12, 2021, we closed on an offering of common stock. We issued 1,303,408 shares of common stock. Net proceeds were approximately $8.5 million.

On February 16, 2021, we closed on an offering of common stock. We issued 1,916,667 shares of common stock. Net proceeds were approximately $26.7 million.

On August 20, 2021, we entered into an at-the-market equity distribution agreement for the sale of up to $25.0 million of common stock. Through September 30, 2021, we sold 109,523 shares under the agreement at a weighted average price of $5.32 per share. Net proceeds after commissions and offering expenses were approximately $0.5 million.

On September 28, 2021, we closed on an offering of common stock. We issued 5,000,000 shares of common stock. Net proceeds were approximately $19.5 million.

On May 20, 2021, we amended our certificate of incorporation to effect a one-for-fifteen reverse stock split of our common stock. All common stock, equity, share and per share amounts in the financial statements and notes have been retroactively adjusted to reflect the reverse stock split.

On May 20, 2021, we amended our certificate of incorporation to decrease the number of authorized shares of common stock from 250,000,000 to 125,000,000.

We believe that our cash and cash equivalents of $59.4 million, at September 30, 2021, will be sufficient to fund our operations and ongoing trials for more than two years from the date of this filing. We do not have a recurring source of revenue to fund our operations and will need to raise additional funds to continue to develop and apply for regulatory approval for our drug candidates.

We are exploring various sources of funding for development and applying for regulatory approval of our research compounds as well as for our ongoing operations. If we raise additional funds through strategic collaborations and alliances or licensing arrangements with third parties, which may include existing collaboration partners, we may have to relinquish valuable rights to our technologies or product candidates or grant licenses on terms that are not favorable to us. There can be no assurance, however, that we will be successful in obtaining such financing in sufficient amounts, on terms acceptable to us, or at all. In addition, there can be no assurance that we will obtain approvals necessary to market our product candidates or achieve profitability or sustainable, positive cash flow. If we are unable to successfully raise sufficient additional capital, through future financings or through strategic and collaborative arrangements, we will not have sufficient cash to fund our ongoing trials and operations.

Product Candidates / Compounds

Narazaciclib (ON 123300) — Differentiated Multi-Kinase Inhibitor Targeting CDK4/6

We believe based on data from preclinical studies, that narazaciclib has the potential to overcome the limitations of the current generation of approved cyclin dependent kinase (CDK 4/6) inhibitors. Pursuant to a license agreement with Temple University dated January 1, 1999 as amended March 21, 2013, we licensed compounds including narazaciclib from Temple University. Narazaciclib is a novel multi-kinase inhibitor that targets both CDK4/6 as well as other tyrosine kinases believed to drive tumor proliferation, tumor cell survival and metastasis. The below table depicts the half-maximal in vitro inhibitory concentration (IC₅₀) of narazaciclib and palbociclib, which is a quantitative measure indicating the concentration of each drug needed to inhibit these listed kinases by 50%.

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	NARAZACICLIB	PALBOCICLIB
Kinase	IC50 (nM)	IC50 (nM)
CDK 4/cyclin D1	3.87	5.36
CDK 6/cyclin D1	9.82	3.76
ARK 5	4.95	>5,000.00
FLT3	12.22	>10,000.00
FYN	11.09	>10,000.00
FMS	10.00	>10,000.00
PDGFRβ	26.00	>10,000.00
FGFR1	26.00	>10,000.00
ABL	53.32	>10,000.00
PI3K-δ	144.00	>10,000.00

- Narazaciclib Investigator Brochure v1.

One such tyrosine kinase ARK5, also known as NUAK1, is involved in a number of survival pathways such as regulating AKT dependent cell survival, cell metabolism through c-MYC activity, tumor cell survival under oxidative stress and tumor cell migration (Faisal, 2020, Lui, 2012, Port, 2018). The combination of CDK and ARK5 inhibitors in the same molecular entity is proposed to have a differentiated effect on cancer cells by simultaneously inhibiting both cell cycle (cytostatic) and cellular metabolism (cytotoxic) pathways through CDK and ARK5, respectively. We and our partner, HanX Biopharmaceuticals, Inc. (“HanX”), have recently initiated clinical studies to begin evaluating whether these findings from preclinical studies may translate to clinical activity or clinical benefit in cancer patients.

In certain in vitro models, the kinase inhibitory profile of narazaciclib had high activity against CDK4, CDK6, ARK5, c-fms, PDGFRß and PI3K-δ, all of which are associated with the growth, survival and metastasis of human tumor cells (Reddy, 2014). In an in vitro investigation of narazaciclib against a broad spectrum of human tumor cell lines, narazaciclib displayed potent antiproliferative activity, with 50% growth inhibitory concentrations (GI50) ranging from 0.02 µM to 1.5 µM. In these in vitro models, narazaciclib exhibited a broad range of activity against a wide spectrum of cell lines of both hematological origin (lymphoma, leukemia and myeloma) as well as solid tumors derived from multiple organ sites. Studies on drug-resistant human tumor cell lines suggested that narazaciclib is not a multidrug resistance gene (mdr1) substrate and may be active against drug-resistant tumor cell lines (IBv.1 2020; Reddy, 2014). The activity of narazaciclib does not appear to be affected by the overexpression of MDR-1 and induced apoptosis in both ibrutinib-sensitive and ibrutinib-resistant patient derived cells (Divakar, 2016). The ability of narazaciclib to inhibit the CDK4/6/RB1 pathway has also been shown in pre-clinical testing of mantle cell lymphoma (Divakar, 2016), multiple myeloma (Perumal, 2016), various breast cancer subtypes (Reddy 2014) and colorectal cancer (IBv.1 2020).

The effectiveness of first-generation non-selective CDK inhibitors (Selicilib/roscovitine and Alvocidib/ flavopiridol) in early trials was limited due to toxicities (Blachly 2013). Second-generation compounds (palbociclib and ribociclib) specifically inhibit CDK4 and 6, thereby inhibiting retinoblastoma (RB) protein phosphorylation. Abemaciclib is a multikinase CDK4/6 inhibitor with low nano molar activity against CDK4/6. The second generation CDK4/6 inhibitors have substantially improved clinical outcomes for patients with hormonal-receptor (HR) positive metastatic breast cancer (Hortobagyi 2018, Sledge 2017, Finn 2016). Several CDK4/6 inhibitors (palbociclib, ribociclib and abemaciclib) have been approved and are now standard of care either alone (abemaciclib) or in combination with anti-estrogen therapy for patients with HR-positive, HER2-negative metastatic breast cancer. Another CDK4/6 inhibitor has recently been approved, trilaciclib, in the supportive care space, for the prevention of myelosuppression following chemotherapy.

In December 2017, we entered into a license and collaboration agreement with HanX, a company focused on development of novel oncology products, for the further development, registration and commercialization in China of narazaciclib. Under the terms of the agreement, we received an upfront payment, and will receive regulatory and commercial milestone payments, as well as royalties on any future Chinese sales if the drug is approved. The key feature

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of the 2017 collaboration was that HanX provided all funding required for the Chinese Investigational New Drug Application (a “IND”) thereby enabling the studies necessary in order to seek IND approval by the National Medical Products Administration (Chinese FDA). In the fourth quarter of 2019, HanX filed an IND with the Chinese FDA which was approved on January 6, 2020. We and HanX also intended for these studies underlying the Chinese IND approval, to meet the US Food and Drug Administration (“FDA”) standards for IND approval. Accordingly, such studies were used by us for an IND filing with the US FDA. In September 2020, a Phase 1 Study with narazaciclib in cancer patients was initiated in China. We maintain global rights to the study and study data outside of China.

Our IND submission to the US FDA was submitted in November 2020 and the FDA Study May Proceed letter was issued in December 2020. Enrollment into the US phase 1 study commenced in May 2021. Enrollment in the first cohort of the Phase 1 solid tumor study of narazaciclib is complete with no dose limiting toxicities (DLT’s) observed. The second cohort is currently ongoing. The study will assess the safety, tolerability and pharmacokinetics of narazaciclib administered orally at increasing doses starting at 40 mg daily for consecutive 28-day cycles in patients (n=36) with relapsed/refractory advanced cancer.

In partnership with HanX, a complementary Phase 1 study for patients with advanced relapsed/refractory cancer has been initiated in China at three sites and the first patient was enrolled on September 15, 2020. In China, the first three dose cohorts have been completed and the fourth dose cohort is ongoing. No dose limiting toxicities have been observed to date.

Collectively, once completed, these two Phase 1 studies are expected to provide preliminary safety data and the recommended Phase 2 dose and schedule for narazaciclib as a single agent. We believe our CDK inhibitor is differentiated from other agents in the market or in development due to its multi-kinase inhibition profile.

Retinoblastoma (Rb) protein is a master regulator of cell division and is critical to several cellular processes including senescence, self-renewal, replication and apoptosis (Engel, 2015). It is believed that inactivation of Rb by CDKs leads to malignant cell formation and occurs in the pathogenesis of some cancers. In a preclinical Retinoblastoma (Rb) positive xenograft model for breast cancer, narazaciclib activity was shown to be similar to palbociclib (Pfizer’s Ibrance ^®). Moreover, based on the same preclinical model, narazaciclib may have the potential advantage of reduced neutropenia when compared to palbociclib. Whereas both compounds resulted in decreased RBC and platelet counts in this preclinical model system, palbociclib was found to have a more prominent and statistically significant (P< 0.01) inhibitory effect on neutrophil counts when compared to narazaciclib. These results would need to be replicated in clinical trials.

In vitro studies compared the growth inhibitory activity of narazaciclib and palbociclib in breast cancer RB null cell lines, which demonstrated resistance to palbociclib while maintaining sensitivity towards narazaciclib (IBv.1 2020). Studies using mantle cell lymphoma cells indicated that narazaciclib was able to induce cell death via induction of apoptosis by inhibiting the AKT/PI3K/mTOR pathway while palbociclib treatment was only able to induce cell cycle arrest due to the inhibition of CDK4/6 (Divakar, 2016). Narazaciclib treatment was associated with the presence of several apoptotic markers (PARP, caspase 3, caspase 7 and caspase 9) and narazaciclib (but not palbociclib) led to the generation of apoptotic cells. Overall, apoptosis following narazaciclib exposure has been observed in the following cell lines: breast cancer (IBv.1 2020, Reddy, 2014), mantle cell lymphoma (Divakar, 2016), multiple myeloma (Perumal, 2016) and colorectal cancer (IBv.1 2020).

In addition to CDK4/6 and PI3 Kinase pathways, narazaciclib inhibits several other kinases in vitro including ARK5 (NUAK1) (IC50 of 4.95 nM) (IBv.1 2020, Reddy, 2014) while palbociclib does not. ARK5 is a member of the AMP -activated protein kinase (AMPK) family and is thought to function as a key regulator of cellular energy homeo-stasis (Liu, 2012) and is important in a number of cancer cell survival pathways. Overexpression of ARK5 is associated with poor prognosis in hepatocellular cancer (Cui, 2013), ovarian cancer (Phippen, 2016), colorectal cancer (Port, 2018) and glioblastoma (Lu, 2013). ARK5 is involved in the increased invasiveness, migration and metastatic potential of breast cancer cells (Chang, 2012), colorectal cancer (Kusakai, 2004), gastric cancer (Chen, 2017), and multiple myeloma (Suzuki et al., 2005). Narazaciclib inhibits ARK5 resulting in down regulation of the mTOR/MYC/RB1 pathways leading to cell cycle arrest and apoptosis.

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Because ARK5 activity is now recognized as a component in promoting cancer cell migration and invasion (Kusaki, 2004) the effect of narazaciclib treatment may have an impact on cell migration and metastasis. In certain in vitro models, narazaciclib was able to inhibit the percent migration of U87 cells in a concentration- dependent manner. The time and concentrations that were tested did not result in cell death but did inhibit cell division at the higher concentrations (IBv.1 2020). The ability of narazaciclib to inhibit cell migration was compared to palbociclib using a wound healing model. Triple negative cancer cell migration was inhibited for 72 hours in the presence of narazaciclib but not in the presence of palbociclib (IBv.1 2020).

The pathogenesis and progression of a number of cancers, including breast and multiple myeloma, is linked to C-Myc (Li, 2003) which was subsequently dependent on ARK5 activity (Liu, 2012) and calcium dependent metabolism (Monteverde, 2018). The inhibition of ARK5 has been shown to be lethal in MYC overexpressing tumors (Liu, 2012, Perumal, 2016) and targeting ARK5 in the inhibitory profile of narazaciclib has the potential to overcome the emergence of resistance to CDK4/6 inhibitors due to the loss of retinoblastoma function and C-Myc overexpression. Preclinical studies with tumor cell lines suggest that several malignancies including HR-positive breast cancer, colorectal carcinoma, hepatocellular carcinoma, mantle cell lymphoma and multiple myeloma, may be clinically responsive to narazaciclib exposure (Reddy, 2014, Divakar, 2016, Perumal, 2016). Furthermore, narazaciclib has been tested in four murine xenograft models (breast cancer, colorectal cancer, mantle cell lymphoma and multiple myeloma) and was found to have on-target activity and be non-toxic to the animals (Reddy, 2014; Divakar, 2016; Perumal, 2016; and IBv.1 2020).

Cancer cells can lose RB function through mutation and become resistant or insensitive to palbociclib. Generally, second generation agents have not been shown to be suitable for single agent therapy and must be used in combination with hormonal therapy. In addition, the rate of disease progression that occurs, especially in patients with visceral disease (Hortobagyi 2018), may benefit from the novel inhibitory effects of narazaciclib. This hypothesis needs to be proven in a clinical trial.

Unfortunately, mechanisms of acquired resistance are emerging with the approved CDK4/6 inhibitors leading to progression in patients with breast cancer (Spring, 2019; Knudsen, 2020). Therefore, the unmet medical need supports development of the next (third) generation CDK4/6 inhibitors in advanced HR+/HER2- breast cancer. The inhibitory effect of narazaciclib may provide a therapeutic strategy to optimize efficacy of CDK 4/6 inhibition and reduce emergence of resistance.

We believe narazaciclib has a favorable kinase inhibitory profile in comparison to the approved CDK4/6 inhibitors (palbociclib, ribociclib, and abemaciclib) and may result in both tumorigenic and safety benefits (Perumal, 2016, Divakar, 2016).

Based on data from continuous dosing studies in rats and monkeys the safety profile of narazaciclib is anticipated to be similar to the approved CDK4/6 inhibitors with myelosuppression and gastrointestinal toxicity being most common. Management of these adverse events is expected to follow that used for the approved CDK 4/6 inhibitors. We believe that the proposed mechanism of action of narazaciclib, the unmet medical need of the advanced cancers potentially targeted by narazaciclib and the anticipated safety profile of narazaciclib as seen in pre-clinical studies, support conducting clinical studies.

Clinical development of narazaciclib for both breast cancer as well as other solid tumors in clinical trials is warranted based on the preclinical in vitro studies as well as the xenograft models. Onconova plans to advance testing whether narazaciclib will demonstrate improved activity and/or safety in patients with advanced malignancies.

Oral Rigosertib and PD-1 Combination in KRAS-Mutated Cancers

We are currently supporting investigator-initiated studies (ISS) that are exploring the use of rigosertib for cancers driven by mutated Ras genes including a Phase 1/2a study of rigosertib in combination with a PD-1 inhibitor for patients with progressive K-Ras mutated non-small cell lung cancer (NSCLC). The NSCLC study is open and continues to enroll patients. The objectives of this study are to identify the recommended Phase 2 dose (RP2D) for future studies and characterize the safety profile of the combination treatment. Preliminary results are expected in 2021. On June 28, 2021, we announced an update regarding this NSCLC study, with an expansion of the trial underway at the highest dose

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in the current protocol. Continued dose escalation is being planned as we believe the maximum tolerated dose has not been reached. In addition, preliminary efficacy data support the preclinical observation of rigosertib augmenting the response to checkpoint inhibition (CPI) in patients who had previously failed all standard of care treatment, including CPI. Data presented at the 3rd Annual RAS Targeted Drug Development Summit (September 21-23, 2021), demonstrated two partial responses and one stable disease out of seven evaluable patients, or a clinical benefit rate of 43% (3/7). The two patients with a partial response harbored different KRAS mutations; suggesting that patients with a variety of KRAS mutations may have the potential to respond to the novel combination including rigosertib. We believe this supports further investigation of rigosertib in combination with CPI in KRAS mutated NSCLC.

On June 17, 2021, we announced a publication in Molecular Cancer (Yan, C., Saleh, N., Yang, J. et al. Novel induction of CD40 expression by tumor cells with RAS/RAF/PI3K pathway inhibition augments response to checkpoint blockade. Mol Cancer 20, 85; 2021) which demonstrated that rigosertib synergistically combined with CPI improved tumor growth inhibition and survival in a murine melanoma model that did not respond to CPI alone. Rigosertib’s anti-cancer activity was due to its ability to reverse immunosuppressive tumor microenvironments. We believe this pre-clinical data support the clinical evaluation of rigosertib in combination with a CPI in metastatic melanoma that has progressed on CPI therapy and we expect an ISS for continued development in the area will commence.

Rigosertib as monotherapy

Based on rigoserib’s activity against another important cell cycle pathway, PLK-1 (Antanasova, 2019), a Phase 1b/2 ISS with rigosertib monotherapy in advanced squamous cell carcinoma associated with recessive dystrophic epidermolysis bullosa (RDEB-SCC) has enrolled its first patient.

Rare Disease Program in “RASopathies”

Based on the mechanism of action data published in the journal Cell in 2016, we initiated a collaborative development program focusing on a group of rare diseases with a well- defined molecular basis in expression or defects involving the Ras effector pathways. Since RASopathies are rare congenital diseases affecting young children, we embarked on a multifaceted collaborative program involving patient advocacy, government and academic organizations. RASopathies are usually caused by germline mutations in genes that alter the RAS subfamily and mitogen-activated protein kinases (MAPK) that control signal transduction and are among the most common genetic syndromes. Together, this group of diseases can impact more than 1 in 1,000 individuals, according to RASopathies.Net.

The NCI has conducted preclinical studies with cell lines from two pediatric solid tumors (rhabdomyosarcoma and neuroblastoma), including xenograft models. For both tumor cell lines, in vitro rigosertib exposure was associated with reduced cell viability associated with destabilization of microtubules, mitotic arrest and apoptosis. In a rhabdomyosarcoma xenograft model, rigosertib treatment delayed time to tumor progression and prolonged survival in the animals treated with rigosertib. (Kowalczyk, 2020)

Studies using leukemia cells from the rare childhood RASopathy, known as Juvenile Myelomonocytic Leukemia (JMML), have been conducted. In preliminary in vitro studies performed at Notable Labs, JMML cell killing was observed following rigosertib exposure. Murine xenograft studies performed at the University of California, San Francisco and funded through the Leukemia Lymphoma Society, evaluated rigosertib in this Ras-mutated disease. Further studies with JMML and rigosertib are under consideration.

Critical Accounting Policies and Significant Judgments and Estimates

This management’s discussion and analysis of our financial condition and results of operations is based on our interim unaudited consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in our consolidated financial statements. On an ongoing basis, we evaluate our estimates and judgments, including those related to accrued expenses, revenue recognition, deferred revenue and stock-based compensation. We base our estimates on historical experience, known trends and events and various other factors that we believe to be reasonable under the circumstances,

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the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.  There have been no significant changes in our critical accounting policies as discussed in our annual report on Form 10-K filed with the SEC on March 18, 2021.

The full extent to which COVID-19 will directly or indirectly impact our business, results of operations and financial condition, including expenses and manufacturing, clinical trials and research and development costs, depends on future developments that are highly uncertain at this time.

Results of Operations

Comparison of the Three Months Ended September 30, 2021 and 2020

	Three Months Ended September 30,
	2021		2020		Change
Revenue	$	57,000	$	66,000	$	(9,000)
Operating expenses:
General and administrative		2,284,000		2,147,000		(137,000)
Research and development		1,763,000		4,193,000		2,430,000
Total operating expenses		4,047,000		6,340,000		2,293,000
Loss from operations		(3,990,000)		(6,274,000)		2,284,000
Change in fair value of warrant liability		530,000		56,000		474,000
Other income (expense), net		7,000		(23,000)		30,000
Net loss	$	(3,453,000)	$	(6,241,000)	$	2,788,000

Revenues

Revenues decreased by $9,000, or 14%, for the three months ended September 30, 2021 when compared to the same period in 2020 because of higher revenue from clinical supply to SymBio in the 2020 period.

General and administrative expenses

General and administrative expenses in total were similar for the three months ended September 30, 2021 compared to the three months ended September 30, 2020, increasing by $0.1 million. This increase was caused by $0.3 million higher expenses for investor relations, proxy solicitation, and fees related to our special meeting by proxy, $0.1 million higher bonus accruals in the 2021 period, and $0.1 higher stock compensation expense in the 2021 period, offset by $0.2 million lower professional and consulting fees and $0.2 million lower commercialization expenses in the 2021 period.

The details of our general and administrative expenses are:

	Three Months Ended September 30,
	2021		2020
Professional & consulting fees	$	287,000	$	523,000
Stock based compensation		153,000		61,000
Personnel related		707,000		595,000
Commercial		101,000		329,000
Public company costs		515,000		229,000
Insurance & other		521,000		410,000
	$	2,284,000	$	2,147,000

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Research and development expenses

Research and development expenses decreased by $2.4 million, or 58%, to $1.8 million for the three months ended September 30, 2021 from $4.2 million for the three months ended September 30, 2020. This decrease was caused primarily by $1.7 million lower clinical development and consulting expenses on the INSPIRE program in the 2021 period, and also by $0.7 million lower personnel and stock compensation expense during the 2021 period, following reductions in our workforce completed in the third and fourth quarter of 2020.

The details of our research and development expenses are:

	Three Months Ended September 30,
	2021		2020
Preclinical & clinical development	$	727,000	$	1,799,000
Personnel related		397,000		1,063,000
Manufacturing, formulation & development		260,000		274,000
Stock based compensation		29,000		47,000
Consulting fees		350,000		1,010,000
	$	1,763,000	$	4,193,000

Change in fair value of warrant liability

The fair value of the warrant liability decreased $530,000 for the three months ended September 30, 2021, compared to an increase of $56,000 for the three months ended September 30, 2020. This change was caused by the elimination of the warrant liability during the third quarter of 2021 due to the expiration of the tradable warrants in July, 2021.

Other income (expense), net

Other income (expense), net, was $7,000 of income for the three months ended September 30, 2021 and a loss of $23,000 for the three months ended September 30, 2020.  The change of $30,000 was due to lower foreign currency exchange losses in the 2021 period.

Comparison of the Nine Months Ended September 30, 2021 and 2020

	Nine Months Ended September 30,
	2021		2020		Change
Revenue	$	170,000	$	174,000	$	(4,000)
Operating expenses:
General and administrative		7,351,000		6,548,000		(803,000)
Research and development		5,552,000		12,364,000		6,812,000
Total operating expenses		12,903,000		18,912,000		6,009,000
Loss from operations		(12,733,000)		(18,738,000)		6,005,000
Change in fair value of warrant liability		321,000		(63,000)		384,000
Other income (expense), net		13,000		73,000		(60,000)
Net loss	$	(12,399,000)	$	(18,728,000)	$	6,329,000

Revenues

Revenues decreased by $4,000, or 2%, for the nine months ended September 30, 2021 when compared to the same period in 2020 because of lower clinical supply revenue from SymBio in the 2021 period.

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General and administrative expenses

General and administrative expenses increased by $0.8 million, or 12%, to $7.4 million for the nine months ended September 30, 2021 from $6.5 million for the nine months ended September 30, 2020. The increase was attributable primarily to $1.4 million higher expenses for investor relations, proxy solicitation, and fees related to our special meeting by proxy in the 2021 period, to $0.3 million higher personnel related costs, and also to $0.2 million higher insurance expenses, and also $0.1 million higher stock compensation expenses in the 2021 period. These increases were partially offset by $0.5 million lower professional and consulting fees, and $0.7 million lower commercial expenses during the 2021 period.

The details of our general and administrative expenses are:

	Nine Months Ended September 30,
	2021		2020
Professional & consulting fees	$	1,227,000	$	1,725,000
Stock based compensation		272,000		152,000
Personnel related		2,282,000		2,013,000
Commercial		101,000		753,000
Public company costs		2,370,000		967,000
Insurance & other		1,099,000		938,000
	$	7,351,000	$	6,548,000

Research and development expenses

Research and development expenses decreased by $6.8 million, or 55%, to $5.6 million for the nine months ended September 30, 2021 from $12.4 million for the nine months ended September 30, 2020. This decrease was caused primarily by $5.8 million lower clinical development and consulting expenses on the INSPIRE program and the oral rigosertib combination program in the 2021 period, by $0.1 million lower manufacturing costs, and also by $1.5 million lower personnel and stock compensation expense during the 2021 period, following reductions in our workforce completed in the third and fourth quarter of 2020. These decreases were partially offset by $0.6 million higher expenses on the narazaciclib development program.

The details of our research and development expenses are:

	Nine Months Ended September 30,
	2021		2020
Preclinical & clinical development	$	1,887,000	$	5,709,000
Personnel related		1,515,000		2,911,000
Manufacturing, formulation & development		968,000		1,074,000
Stock based compensation		45,000		141,000
Consulting fees		1,137,000		2,529,000
	$	5,552,000	$	12,364,000

Change in fair value of warrant liability

The fair value of the warrant liability decreased $0.3 million for the nine months ended September 30, 2021, compared to an increase of $0.1 million for the nine months ended September 30, 2020. This change was caused by the elimination of the warrant liability during the third quarter of 2021 due to the expiration of the tradable warrants in July, 2021.

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Other income (expense), net

Other income (expense), net, was income of $13,000 for the nine months ended September 30, 2021 and $73,000 for the nine months ended September 30, 2020. The change of $60,000 was due to $100,000 lower net interest income in the 2021 period due to lower average cash balances, partially offset by $40,000 lower foreign currency exchange losses and other items in the 2021 period.

Liquidity and Capital Resources

Since our inception, we have incurred net losses and experienced negative cash flows from our operations. We incurred net losses of $12.4 million and $18.7 million for the nine months ended September 30, 2021 and 2020, respectively. Our operating activities used $15.2 million and $17.6 million of net cash during the nine months ended September 30, 2021 and 2020, respectively. At September 30, 2021, we had an accumulated deficit of $441.0 million, working capital of $52.9 million, and cash and cash equivalents of $59.4 million. We believe that our cash and cash equivalents as of September 30, 2021, will be sufficient to fund our operations and ongoing trials for more than two years from the date of this filing.

Cash Flows

The following table summarizes our cash flows for the nine months ended September 30, 2021 and 2020:

	Nine Months Ended September 30,
	2021		2020
Net cash (used in) provided by:
Operating activities	$	(15,222,000)	$	(17,607,000)
Investing activities		—		(15,000)
Financing activities		55,595,000		19,078,000
Effect of foreign currency translation		(20,000)		16,000
Net increase in cash and cash equivalents	$	40,353,000	$	1,472,000

Net cash used in operating activities

Net cash used in operating activities was $15.2 million for the nine months ended September 30, 2021 and consisted primarily of a net loss of $12.4 million, including a decrease in the fair value of warrant liability of $0.3 million, and $0.3 million of both noncash stock-based compensation and depreciation expense. Changes in operating assets and liabilities resulted in a net decrease in cash of $2.8 million. Significant changes in operating assets and liabilities included a decrease in prepaid expenses and other current assets of $0.2 million, a decrease in accounts payable and accrued liabilities of $3.0 million due to timing of invoices and payments to our vendors, and a decrease in deferred revenue of $0.2 million due to recognition of the unamortized portion of the upfront payment under our collaboration agreement with SymBio.

Net cash used in operating activities was $17.6 million for the nine months ended September 30, 2020 and consisted primarily of a net loss of $18.7 million, including an increase in the fair value of warrant liability of $0.1 million, and $0.3 million of both noncash stock-based compensation and depreciation expense. Changes in operating assets and liabilities resulted in a net increase in cash of $0.8 million. Significant changes in operating assets and liabilities included an increase in accounts payable and accrued liabilities of $1.0 million due to timing of invoices and payments to our vendors, partially offset by an increase in prepaid expenses and other current assets of $0.1 million, and a decrease in deferred revenue of $0.2 million due to recognition of the unamortized portion of the upfront payment under our collaboration agreement with SymBio.

Net cash used in investing activities

There was no cash used in investing activities during the nine months ended September 30, 2021. Net cash used in investing activities was $15,000 related to computer equipment during the nine months ended September 30, 2020.

32

Net cash provided by financing activities

Net cash provided by financing activities was $55.6 million and $19.1 million for the nine months ended September 30, 2021 and 2020, respectively.  The net cash provided by financing activities in the 2021 period resulted from proceeds received from the sales of common stock and the exercise of warrants. The net cash provided by financing activities in the 2020 period of $19.1 million resulted from the sale of common stock and the exercise of warrants.

Operating and Capital Expenditure Requirements

We believe that our cash and cash equivalents of $59.4 million at September 30, 2021, will be sufficient to fund our operations and ongoing trials for more than two years from the date of this filing. The consolidated financial statements do not include any adjustments relating to recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should we be unable to continue in existence.

We have not achieved profitability since our inception and we expect to continue to incur net losses for the foreseeable future. We expect our net cash expenditures in 2022 to be comparable to what they were in 2021, due primarily to the completion of cash spending related to INSPIRE, and increased spending on our earlier clinical stage (and therefore less expensive to develop) pipeline in 2022. The nature, design, size, and cost of further studies will depend in large part on the outcome of ongoing studies, discussions with regulators, and the potential in-license of any additional compounds or product candidates.

For additional risks, please see “Risk Factors” in Part II of this report and in previously disclosed in our most recent annual report on Form 10-K.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

As a smaller reporting company, the Company is not required to provide the information otherwise required by this Item.

Item 4. Controls and Procedures

Managements’ Evaluation of our Disclosure Controls and Procedures

Our management, with the participation of our principal executive and principal financial officers, evaluated the effectiveness of our disclosure controls and procedures as of September 30, 2021. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Based on the evaluation of our disclosure controls and procedures as of September 30, 2021, our principal executive and principal financial officers concluded that, as of such date, our disclosure controls and procedures were effective.

33

Changes in Internal Control Over Financial Reporting

Our management, with the participation of our principal executive and principal financial officers, evaluated any changes in our internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during our most recently completed fiscal quarter. Based on that evaluation, our principal executive and principal financial officers concluded that no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the fiscal quarter ended September 30, 2021 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings

We are not party to any pending material legal proceedings and are not aware of any such proceedings contemplated by governmental authorities.

Item 1A. Risk Factors

In addition to the information contained in this report, you should carefully consider the risk factors discussed in Part I, “Item 1A. Risk Factors” in our Annual Report on Form 10-K filed with the SEC on March 18, 2021 and our Quarterly Reports on Form 10-Q for the quarters ended June 30, 2021 and March 31, 2021, which could materially affect our business, financial condition or future results. The risks described in our Annual Report on Form 10-K and Quarterly Reports on Form 10-Q are not the only risks we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or operating results.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Not applicable.

Item 3. Defaults Upon Senior Securities

Not applicable.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

Not applicable.

34

Item 6. Exhibits

EXHIBIT INDEX

Exhibit Number	Description
10.1	Form of Restricted Stock Unit Agreement.
10.2	Form of Non-Qualified Stock Option Agreement.
10.3	Equity Distribution Agreement, dated as of August 20, 2021, between Onconova Therapeutics, Inc. and Piper Sandler & Co. (Incorporated by reference to Exhibit 1.1 to the Company’s Current Report on Form 8-K filed on August 20, 2021).
31.1	Rule 13a-14(a)/15d-14(a) Certifications of Principal Executive Officer
31.2	Rule 13a-14(a)/15d-14(a) Certifications of Principal Financial Officer
32.1	Section 1350 Certifications of Principal Executive Officer
32.2	Section 1350 Certifications of Principal Financial Officer
101.INS	XBRL Instance – The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Labels Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

35

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	ONCONOVA THERAPEUTICS, INC.
Dated: November 15, 2021
	/s/ STEVEN M. FRUCMTMAN, M. D.
	Steven M. Fruchtman, M.D.
	President and Chief Executive Officer
	(Principal Executive and Principal Operating Officer)
Dated: November 15, 2021
	/s/ MARK GUERIN
	Mark Guerin
	Chief Financial Officer
	(Principal Financial Officer)

36

EX-10.1

Exhibit 10.1

ONCONOVA THERAPEUTICS, INC.

2021 INCENTIVE COMPENSATION PLAN

RESTRICTED STOCK UNIT AGREEMENT

This RESTRICTED STOCK UNIT AGREEMENT (the “Agreement”), dated as of the grant date set forth on the Restricted Stock Units Details page in Morgan Stanley Stock Plan Connect (the “Date of Grant”), is delivered by Onconova Therapeutics, Inc. (the “Company”) to the Participant on the Restricted Stock Unit details page in Morgan Stanley Stock Plan Connect (the “Participant”).

RECITALS

The Onconova Therapeutics, Inc. 2021 Incentive Compensation Plan (the “Plan”) provides for the grant of restricted stock units.  The Committee has decided to make this grant of restricted stock units as an inducement for the Participant to promote the best interests of the Company and its stockholders.  The Participant hereby acknowledges the receipt of a copy of the Plan and the official prospectus for the Plan, which is available by accessing [Insert MSSB link] and on the Company’s intranet at [Insert link].  Paper copies of the Plan and the official Plan prospectus are available by contacting the Chief Financial Officer of the Company at 267-759-3680 x. 37 or MGuerin@onconova.us.  This Agreement is made pursuant to the Plan and is subject in its entirety to all applicable provisions of the Plan.  Capitalized terms used herein and not otherwise defined will have the meanings set forth in the Plan.    

1.Grant of Stock Units.  Subject to the terms and conditions set forth in this Agreement and in the Plan, the Company has granted the Participant a number of restricted stock units set forth on the Restricted Stock Unit Details page in Morgan Stanley Stock Plan Connect (the “Stock Units”).  Each Stock Unit represents the right of the Participant to receive a share of Common Stock on the applicable payment date set forth in Section 5 below.

2.Stock Unit Account.  Stock Units represent hypothetical shares of Common Stock, and not actual shares of stock.  The Company shall establish and maintain a Stock Unit account, as a bookkeeping account on its records, for the Participant and shall record in such account the number of Stock Units granted to the Participant.  No shares of Common Stock shall be issued to the Participant at the time the grant is made, and the Participant shall not be, and shall not have any of the rights or privileges of, a stockholder of the Company with respect to any Stock Units recorded in the Stock Unit account.  The Participant shall not have any interest in any fund or specific assets of the Company by reason of this award or the Stock Unit account established for the Participant.

3.Vesting.

(a)The Stock Units shall become vested on the dates set forth on the Restricted Stock Unit Details page in Morgan Stanley Stock Plan Connect (each, a “Vesting Date”), provided that the Participant continues to be employed by, or provide service to, the Employer from the Date of Grant until the applicable Vesting Date.

(b)The vesting of the Stock Units shall be cumulative, but shall not exceed 100% of the Stock Units.  If the vesting schedule would produce fractional Stock Units, the number of Stock Units that vest shall be rounded down to the nearest whole Stock Unit and the fractional Stock Units will be accumulated so that the resulting whole Stock Units will be included in the number of Stock Units that become vested on the last Vesting Date.

(c)In the event of a Change in Control, the provisions of the Plan applicable to a Change in Control shall apply to the Stock Units, and, in the event of a Change in Control, the Committee may take such actions as it deems appropriate pursuant to the Plan.  

If the Company is not the surviving corporation (or survives only as a subsidiary of another corporation) as a result of the Change in Control and the Stock Units are assumed by, or replaced with an award with comparable terms by, the surviving corporation (or parent or subsidiary of the surviving corporation) and the

Participant’s employment or service is terminated by the Employer without Cause or by the Participant for Good Reason (as defined below) on or following a Change in Control and before the Stock Units are fully vested in accordance with the vesting schedule set forth in Section 3(a) above, any unvested Stock Units shall become fully vested upon such termination of employment or service.  In the event that the surviving corporation (or a parent or subsidiary of the surviving corporation) does not assume or replace the Stock Units with a grant that has comparable terms, and the Participant is employed by, or providing services to, the Employer on the date of the Change in Control, any unvested Stock Units shall become fully vested immediately prior to the Change in Control.  For purposes of this Agreement, “Good Reason” shall have the definition set forth in the Participant’s written employment agreement, offer letter or severance agreement entered into by and between the Participant and the Employer (a “Written Agreement”) and shall only apply to the extent such agreement exists and Good Reason is defined therein.

(d)In the event the Participant’s employment is terminated by the Employer without Cause or by the Participant for Good Reason,  any unvested Stock Units shall become fully vested upon such termination of employment; provided, however, that the Participant delivers to the Employer a waiver and release of claims agreement in a form acceptable to the Company that becomes effective in accordance with the timing for any release requirements set forth in a Written Agreement.

4.Termination of Stock Units.  Except as set forth in Sections 3(c) and 3(d), if the Participant ceases to be employed by, or provide service to, the Employer for any reason before all of the Stock Units vest, any unvested Stock Units shall automatically terminate and shall be forfeited as of the date of the Participant’s termination of employment or service.  No payment shall be made with respect to any unvested Stock Units that terminate as described in this Section

5.Payment of Stock Units.

(a)If and when the Stock Units vest, the Company shall issue to the Participant one share of Common Stock for each vested Stock Unit, subject to applicable tax withholding obligations.  Payment shall be made within 30 days after the applicable Vesting Date.

(b)All obligations of the Company under this Agreement shall be subject to the rights of the Employer as set forth in the Plan to withhold amounts required to be withheld for any taxes, if applicable.  The Participant hereby authorizes the Company, or its respective agents, at their discretion, to satisfy any applicable withholding obligations for taxes by  one or a combination of the following methods: (i)   withholding shares of Common Stock otherwise issuable to the Participant upon settlement of the Stock Units; or (ii) instructing a broker on the Participant’s behalf to sell shares of Common Stock otherwise issuable to the Participant upon settlement of the Stock Units and submit the proceeds of such sale to the Company; or (iii) any other method determined by the Company to be in compliance with applicable law.

(c)To the extent not withheld in accordance with the immediately preceding sentence, the Participant shall be required to pay to the Employer, or make other arrangements satisfactory to the Employer to provide for the payment of, any federal, state, local or other taxes that the Employer is required to withhold with respect to the Stock Units. Unless the Committee determines otherwise, share withholding for taxes shall not exceed the Participant’s minimum applicable tax withholding amount.

(d)The obligation of the Company to deliver Common Stock shall also be subject to the condition that if at any time the Board shall determine in its discretion that the listing, registration or qualification of the shares upon any securities exchange or under any state or federal law, or the consent or approval of any governmental regulatory body is necessary or desirable as a condition of, or in connection with, the issuance of shares, the shares may not be issued in whole or in part unless such listing, registration, qualification, consent or approval shall have been effected or obtained free of any conditions not acceptable to the Board.  The issuance of shares to Participant pursuant to this Agreement is subject to any applicable taxes and other laws or regulations of the United States or of any state having jurisdiction thereof.

6.No Stockholder Rights.  Neither the Participant, nor any person entitled to receive payment in the event of the Participant’s death, shall have any of the rights and privileges of a stockholder with respect to shares of Common Stock, including voting rights, until certificates for shares have been issued upon payment of Stock Units.  

7.Grant Subject to Plan Provisions.  This grant is made pursuant to the Plan, the terms of which are incorporated herein by reference, and in all respects shall be interpreted in accordance with the Plan.  The grant and payment of the Stock Units are subject to the provisions of the Plan and to interpretations, regulations and determinations concerning the Plan established from time to time by the Committee in accordance with the provisions of the Plan, including, but not limited to, provisions pertaining to (a) rights and obligations with respect to withholding taxes, (b) the registration, qualification or listing of the shares of Common Stock, (c) changes in capitalization of the Company and (d) other requirements of applicable law.  The Committee may amend the terms of the Stock Units to the extent permitted by the Plan.  The Committee shall have the authority to interpret and construe the Stock Units pursuant to the terms of the Plan, and its decisions shall be conclusive as to any questions arising hereunder.

8.No Employment or Other Rights.  The grant of the Stock Units shall not confer upon the Participant any right to be retained by or in the employ or service of any Employer and shall not interfere in any way with the right of any Employer to terminate the Participant’s employment or service at any time. The right of any Employer to terminate at will the Participant’s employment or service at any time for any reason is specifically reserved.

9.Assignment and Transfers.  Except as the Committee may otherwise permit pursuant to the Plan, the rights and interests of the Participant under this Agreement may not be sold, assigned, encumbered or otherwise transferred except, in the event of the death of the Participant, by will or by the laws of descent and distribution.  In the event of any attempt by the Participant to alienate, assign, pledge, hypothecate, or otherwise dispose of the Stock Units or any right hereunder, except as provided for in this Agreement, or in the event of the levy or any attachment, execution or similar process upon the rights or interests hereby conferred, the Company may terminate the Stock Units by notice to the Participant, and the Stock Units and all rights hereunder shall thereupon become null and void.  The rights and protections of the Company hereunder shall extend to any successors or assigns of the Company and to the Company’s parents, subsidiaries, and affiliates.  This Agreement may be assigned by the Company without the Participant’s consent.

10.Applicable Law.  The validity, construction, interpretation and effect of this Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to the conflicts of laws provisions thereof.  

11.Notice.  Any notice to the Company provided for in this instrument shall be addressed to the Company in care of the Chief Financial Officer at the corporate headquarters of the Company, and any notice to the Participant shall be addressed to such Participant at the current address shown on the payroll of the Employer, or to such other address as the Participant may designate to the Employer in writing.  Any notice shall be delivered by hand or enclosed in a properly sealed envelope addressed as stated above, registered and deposited, postage prepaid, in a post office regularly maintained by the United States Postal Service.  

12.Company Policies.  The Participant agrees that the Stock Units shall be subject to any applicable clawback or recoupment policies, share trading policies and other policies that may be implemented by the Board or imposed under applicable rule or regulation from time to time.

13.Application of Section 409A of the Code.  This Agreement is intended to be exempt from section 409A of the Code under the “short-term deferral” exception and to the extent this Agreement is subject to section 409A of the Code, it will in all respects be administered in accordance with section 409A of the Code.

IN WITNESS WHEREOF, the Company has caused an officer to execute this Agreement, and the Participant has executed this Agreement, effective as of the Date of Grant.

ONCONOVA THERAPEUTICS, INC.

Name:

Title:

By electronic acceptance, the Participant hereby accepts the Stock Units described in this Agreement, and agrees to be bound by the terms of the Plan and this Agreement. The Participant hereby agrees that all decisions and determinations of the Committee with respect to the Stock Units shall be final and binding.

EX-10.2

Exhibit 10.2

ONCONOVA THERAPEUTICS, INC.

2021 INCENTIVE COMPENSATION PLAN

NONQUALIFIED STOCK OPTION AWARD AGREEMENT

This NONQUALIFIED STOCK OPTION AWARD AGREEMENT (the “Agreement”), dated as of the grant date set forth on the Stock Options Details page in Morgan Stanley Stock Plan Connect (the “Date of Grant”), is delivered by Onconova Therapeutics, Inc. (the “Company”) to the Participant on the Stock Options details page in Morgan Stanley Stock Plan Connect (the “Participant”).  

RECITALS

The Onconova Therapeutics, Inc. 2021 Incentive Compensation Plan (the “Plan”) provides for the grant of stock options to purchase shares of Common Stock.  The Committee has decided to make this nonqualified stock option grant as an inducement for the Participant to promote the best interests of the Company and its stockholders.  The Participant hereby acknowledges the receipt of a copy of the Plan and the official prospectus for the Plan, which are available by accessing [Insert MSSB link] and on the Company’s intranet at [Insert link].  Paper copies of the Plan and the official Plan prospectus are available by contacting the Chief Financial Officer of the Company at 267-759-3680 x. 37 or MGuerin@onconova.us.  This Agreement is made pursuant to the Plan and is subject in its entirety to all applicable provisions of the Plan.  Capitalized terms used herein and not otherwise defined will have the meanings set forth in the Plan.    

1.Grant of Option.  Subject to the terms and conditions set forth in this Agreement and in the Plan, the Company has granted to the Participant a nonqualified stock option (the “Option”) to purchase the number shares of Common Stock set forth on the Stock Option Details page in Morgan Stanley Stock Plan Connect (“Shares”) at the Exercise Price per Share set forth on the Stock Option Details page in Morgan Stanley Stock Plan Connect.  The Option shall become exercisable according to Section 2 below.  

2.Exercisability of Option.  

(a)The Option shall become vested and exercisable on the dates set forth on the Stock Option Details page in Morgan Stanley Stock Plan Connect (each, a “Vesting Date”), provided that the Participant continues to be employed by, or provide service to, the Employer from the Date of Grant until the applicable Vesting Date.

(b)The vesting and exercisability of the Option is cumulative, but shall not exceed 100% of the Shares subject to the Option.  If the vesting schedule would produce fractional Shares, the number of Shares subject to the Option that vest and become exercisable shall be rounded down to the nearest whole Share and the fractional Shares will be accumulated so that the resulting whole Shares will be included in the number of Shares subject to the Option that become vested and exercisable on the last Vesting Date.

(c)In the event of a Change in Control, the provisions of the Plan applicable to a Change in Control shall apply to the Option, and, in the event of a Change in Control, the Committee may take such actions as it deems appropriate pursuant to the Plan.  

If the Company is not the surviving corporation (or survives only as a subsidiary of another corporation) as a result of the Change in Control and the Option is assumed by, or replaced with an

award with comparable terms by, the surviving corporation (or parent or subsidiary of the surviving corporation) and the Participant’s employment or service is terminated by the Employer without Cause or by the Participant for Good Reason (as defined below) on or following a Change in Control and before the Option is fully vested and exercisable in accordance with the vesting schedule set forth in Section 2(a) above, any unvested and unexercisable portion of the Option shall become fully vested and exercisable upon such termination of employment or service.  In the event that the surviving corporation (or a parent or subsidiary of the surviving corporation) does not assume or replace the Option with a grant that has comparable terms, and the Participant is employed by, or providing services to, the Employer on the date of the Change in Control, any unvested and unexercisable portion of the Option shall become fully vested and exercisable immediately prior to the Change in Control.  For purposes of this Agreement, “Good Reason” shall have the definition set forth in the Participant’s written employment agreement, offer letter or severance agreement entered into by and between the Participant and the Employer (a “Written Agreement”) and shall only apply to the extent such Written Agreement exists and Good Reason is defined therein.

(d)In the event the Participant’s employment is terminated by the Employer without Cause or by the Participant for Good Reason, and before the Option is fully vested and exercisable in accordance with the vesting schedule set forth in Section 2(a) above, any unvested and unexercisable portion of the Option shall be treated in the manner described in the Written Agreement, if any, and in accordance with the terms and conditions set forth therein to the extent such Written Agreement provides for treatment in connection with a termination without Cause or for Good Reason.

3.Term of Option.

(a)The Option shall have a term of ten years from the Date of Grant and shall terminate at the expiration of that period, unless it is terminated at an earlier date pursuant to the provisions of this Agreement or the Plan. Notwithstanding the foregoing, in the event that on the last business day of the term of the Option, the exercise of the Option is prohibited by applicable law, including a prohibition on purchases or sales of Common Stock under the Company’s insider trading policy, the term of the Option shall be extended for a period of 30 days following the end of the legal prohibition, unless the Committee determines otherwise.

(b)The Option shall automatically terminate upon the happening of the first of the following events:  

(i)The expiration of the 90-day period after the Participant ceases to be employed by, or provide service to, the Employer, if the termination is for any reason other than Disability, death or Cause.  

(ii)The expiration of the six-month period after the Participant ceases to be employed by, or provide service to, the Employer on account of the Participant’s Disability.

(iii)The expiration of the one-year period after the Participant ceases to be employed by, or provide service to, the Employer, if the Participant dies while employed by, or providing service to, the Employer or the Participant dies within 90 days after the Participant ceases to be so employed or to provide services to the Employer for any reason other than Disability, death or Cause.

(iv)The date on which the Participant ceases to be employed by, or provide service to, the Employer for Cause.  In addition, notwithstanding the prior provisions of this Section 3, if the Participant engages in conduct that constitutes Cause after the Participant’s employment or service terminates, the Option shall immediately terminate.

Notwithstanding the foregoing, in no event may the Option be exercised after the date that is immediately before the tenth anniversary of the Date of Grant, except as provided under Section 3(a) above.  Subject to the provisions of Sections 2(c) and 2(d) above, any portion of the Option that is not exercisable at the time the Participant ceases to be employed by, or provide service to, the Employer shall immediately terminate.

4.Exercise Procedures.  

(a)Subject to the provisions of Sections 2 and 3 above, the Participant may exercise part or all of the exercisable Option by giving the Company or its delegate written notice of intent to exercise, specifying the number of Shares as to which the Option is to be exercised and such other information as the Company or its delegate may require.  

At such time as the Committee shall determine, the Participant shall pay the Exercise Price (i) in cash or check, (ii) unless the Committee determines otherwise, by delivering shares of Common Stock owned by the Participant, which shall be valued at their Fair Market Value on the date of exercise, or by attestation (in accordance with procedures prescribed by the Committee) to ownership of shares of Common Stock having a Fair Market Value on the date of exercise at least equal to the Exercise Price, (iii) if permitted by the Committee, by payment through a broker in accordance with procedures permitted by Regulation T of the Federal Reserve Board, (iv) if permitted by the Committee, by withholding shares of Common Stock subject to the exercisable Option, which have a Fair Market Value on the date of exercise equal to the Exercise Price (“net exercise”), or (v) by such other method as the Committee may approve, to the extent permitted by applicable law.  The Committee may impose from time to time such limitations as it deems appropriate on the use of shares of Common Stock to exercise the Option.

(b)The obligation of the Company to deliver Shares upon exercise of the Option shall be subject to all applicable laws, rules, and regulations and such approvals by governmental agencies as may be deemed appropriate by the Committee, including such actions as Company counsel shall deem necessary or appropriate to comply with relevant securities laws and regulations.  

(c)All obligations of the Company under this Agreement shall be subject to the rights of the Employer as set forth in the Plan to withhold amounts required to be withheld for any taxes, if applicable.  The Participant shall be required to pay to the Employer, or make other arrangements satisfactory to the Employer to provide for the payment of, any federal, state, local or other taxes that the Employer is required to withhold with respect to the Option.  If permitted by the Committee, the Participant may elect to, or the Company may require that the Participant, satisfy any tax withholding obligation of the Employer with respect to the Option by having Shares withheld to satisfy the applicable withholding tax rate for federal (including FICA), state, local and other tax liabilities under procedures established by the Company.  Unless the Committee determines otherwise, share withholding for taxes shall not exceed the Participant’s minimum applicable tax withholding amount.

(d)Upon exercise of the Option (or portion thereof), the Option (or portion thereof) will terminate and cease to be outstanding.  

5.Restrictions on Exercise.  Except as the Committee may otherwise permit pursuant to the Plan, only the Participant may exercise the Option during the Participant’s lifetime and, after the Participant’s death, the Option shall be exercisable (subject to the limitations specified in the Plan) solely by the legal representatives of the Participant, or by the person who acquires the right to exercise the Option by will or by the laws of descent and distribution, to the extent that the Option is exercisable pursuant to this Agreement.

6.Grant Subject to Plan Provisions. This grant is made pursuant to the Plan, the terms of which are incorporated herein by reference, and in all respects shall be interpreted in accordance with the Plan. The grant and exercise of the Option are subject to the provisions of the Plan and to interpretations, regulations and determinations concerning the Plan established from time to time by the Committee in accordance with the provisions of the Plan, including, but not limited to, provisions pertaining to (a) rights and obligations with respect to withholding taxes, (b) the registration, qualification or listing of the Shares, (c) changes in capitalization of the Company and (d) other requirements of applicable law. The Committee may amend the terms of this Option to the extent permitted by the Plan. The Committee shall have the authority to interpret and construe the Option pursuant to the terms of the Plan, and its decisions shall be conclusive as to any questions arising hereunder.

7.No Employment or Other Rights.  The grant of the Option shall not confer upon the Participant any right to be retained by or in the employ or service of any Employer and shall not interfere in any way with the right of any Employer to terminate the Participant’s employment or service at any time. The right of any Employer to terminate at will the Participant’s employment or service at any time for any reason is specifically reserved.

8.No Stockholder Rights.  Neither the Participant, nor any person entitled to exercise the Participant’s rights in the event of the Participant’s death, shall have any of the rights and privileges of a stockholder with respect to the Shares subject to the Option, until certificates for Shares have been issued upon the exercise of the Option.

9.Assignment and Transfers.  Except as the Committee may otherwise permit pursuant to the Plan, the rights and interests of the Participant under this Agreement may not be sold, assigned, encumbered or otherwise transferred except, in the event of the death of the Participant, by will or by the laws of descent and distribution. In the event of any attempt by the Participant to alienate, assign, pledge, hypothecate, or otherwise dispose of the Option or any right hereunder, except as provided for in this Agreement, or in the event of the levy or any attachment, execution or similar process upon the rights or interests hereby conferred, the Company may terminate the Option by notice to the Participant, and the Option and all rights hereunder shall thereupon become null and void.  The rights and protections of the Company hereunder shall extend to any successors or assigns of the Company and to the Company’s parents, subsidiaries, and affiliates.  This Agreement may be assigned by the Company without the Participant’s consent.

10.Applicable Law.  The validity, construction, interpretation and effect of this Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to the conflicts of laws provisions thereof.

11.Notice.  Any notice to the Company provided for in this instrument shall be addressed to the Company in care of the Chief Financial Officer at the corporate headquarters of the Company, and

any notice to the Participant shall be addressed to such Participant at the current address shown on the payroll of the Employer, or to such other address as the Participant may designate to the Employer in writing.  Any notice shall be delivered by hand or enclosed in a properly sealed envelope addressed as stated above, registered and deposited, postage prepaid, in a post office regularly maintained by the United States Postal Service.  

12.Company Policies.  The Participant agrees that the Option shall be subject to any applicable clawback or recoupment policies, share trading policies and other policies that may be implemented by the Board or imposed under applicable rule or regulation from time to time.

13.Application of Section 409A of the Code.  This Agreement is intended to be exempt from section 409A of the Code and to the extent this Agreement is subject to section 409A of the Code, it will in all respects be administered in accordance with section 409A of the Code.

[Signature Page Follows]

IN WITNESS WHEREOF, the Company has caused an officer to execute this Agreement, and the Participant has executed this Agreement, effective as of the Date of Grant.

ONCONOVA THERAPEUTICS, INC.

Name:

Title:

By electronic acceptance, the Participant hereby accepts the Option described in this Agreement, and agrees to be bound by the terms of the Plan and this Agreement. The Participant hereby agrees that all decisions and determinations of the Committee with respect to the Option shall be final and binding.

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Steven Fruchtman, certify that:

1.     I have reviewed this quarterly report on Form 10-Q of Onconova Therapeutics, Inc.;

2.     Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.     Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.     The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)  Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)  Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)  Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.     The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)  All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)  Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 15, 2021
	/s/ Steven M. Fruchtman, M.D.
	Steven M. Fruchtman, M.D.
	President and Chief Executive Officer
	(Principal Executive and Principal Operating Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Mark Guerin, certify that:

1.     I have reviewed this quarterly report on Form 10-Q of Onconova Therapeutics, Inc.;

2.     Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.     Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.     The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)  Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)  Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)  Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.     The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)  All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)  Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 15, 2021
	/s/ Mark Guerin
	Mark Guerin
	Chief Financial Officer
	(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Onconova Therapeutics, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Steven Fruchtman, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1.     The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.     That information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 15, 2021	/s/ Steven M. Fruchtman, M.D.
	Steven M. Fruchtman, M.D.
	President and Chief Executive Officer
	( Principal Executive and Principal Operating Officer )

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Onconova Therapeutics, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark Guerin, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1.     The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.     That information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 15, 2021	/s/ Mark Guerin
	Mark Guerin
	Chief Financial Officer
	(Principal Financial Officer)

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
Document and Entity Information
Entity Registrant Name	Onconova Therapeutics, Inc.
Entity Central Index Key	0001130598
Document Type	10-Q
Document Period End Date	Sep. 30, 2021
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Quarterly Report	true
Document Transition Report	false
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		20,890,563
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	ONTX
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-3627252
Entity File Number	001-36020
Entity Address, Address Line One	12 Penns Trail
Entity Address, City or Town	Newtown
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	18940
City Area Code	267
Local Phone Number	759-3680

XML

Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 59,378,000	$ 19,025,000
Receivables	29,000	37,000
Prepaid expenses and other current assets	529,000	722,000
Total current assets	59,936,000	19,784,000
Property and equipment, net	42,000	52,000
Other non-current assets	12,000	150,000
Total assets	59,990,000	19,986,000
Current liabilities:
Accounts payable	4,050,000	4,833,000
Accrued expenses and other current liabilities	2,749,000	4,962,000
Deferred revenue	226,000	226,000
Total current liabilities	7,025,000	10,021,000
Warrant liability		321,000
Deferred revenue, non-current	3,299,000	3,469,000
Total liabilities	10,324,000	13,811,000
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value, 5,000,000 authorized at September 30, 2021 and December 31, 2020, none issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, $0.01 par value, 125,000,000 and 250,000,000 authorized at September 30, 2021 and December 31, 2020, 20,890,563 and 12,396,219 shares issued and outstanding at September 30, 2021 and December 31, 2020	209,000	124,000
Additional paid in capital	490,418,000	434,593,000
Accumulated deficit	(440,955,000)	(428,556,000)
Accumulated other comprehensive income	(6,000)	14,000
Total stockholders' equity	49,666,000	6,175,000
Total liabilities and stockholders' equity	$ 59,990,000	$ 19,986,000

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Condensed Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
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	125,000,000	250,000,000
Common stock, shares issued	20,890,563	12,396,219
Common stock, shares outstanding	20,890,563	12,396,219

XML

Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Statements of Operations
Revenue	$ 57,000	$ 66,000	$ 170,000	$ 174,000
Operating expenses:
General and administrative	2,284,000	2,147,000	7,351,000	6,548,000
Research and development	1,763,000	4,193,000	5,552,000	12,364,000
Total operating expenses	4,047,000	6,340,000	12,903,000	18,912,000
Loss from operations	(3,990,000)	(6,274,000)	(12,733,000)	(18,738,000)
Change in fair value of warrant liability	530,000	56,000	321,000	(63,000)
Other income (loss), net	7,000	(23,000)	13,000	73,000
Net loss	$ (3,453,000)	$ (6,241,000)	$ (12,399,000)	$ (18,728,000)
Net loss per share, basic and diluted (in dollars per share)	$ (0.22)	$ (0.52)	$ (0.80)	$ (1.65)
Basic and diluted weighted average shares outstanding (in shares)	15,979,180	12,058,508	15,463,720	11,353,169

XML

Condensed Consolidated Statements of Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Statements of Comprehensive Loss
Net loss	$ (3,453,000)	$ (6,241,000)	$ (12,399,000)	$ (18,728,000)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net	(8,000)	15,000	(20,000)	16,000
Other comprehensive (loss) income, net of tax	(8,000)	15,000	(20,000)	16,000
Comprehensive loss	$ (3,461,000)	$ (6,226,000)	$ (12,419,000)	$ (18,712,000)

XML

Consolidated Statement of Stockholders' Equity (Deficit) - USD ($)	Common Stock	Additional Paid in Capital	Accumulated deficit	Accumulated other comprehensive (loss) income	Total
Balance at Dec. 31, 2019	$ 74,000	$ 414,917,000	$ (403,399,000)	$ (18,000)	$ 11,574,000
Balance (in shares) at Dec. 31, 2019	7,411,157
Increase (Decrease) in Stockholders' Equity (Deficit)
Net loss			(18,728,000)		(18,728,000)
Other comprehensive income (loss)				16,000	16,000
Stock-based compensation		275,000			275,000
Issuance of common stock, net	$ 18,000	9,044,000			9,062,000
Issuance of common stock, net (in shares)	1,844,168
Issuance of common stock upon exercise of warrants	$ 30,000	9,985,000			10,015,000
Issuance of common stock upon exercise of warrants (in shares)	2,964,560
Issuance of common stock, pre-funded warrants and warrants, net	$ 1,000				1,000
Issuance of common stock, pre-funded warrants and warrants, net (in shares)	83,334
Balance at Sep. 30, 2020	$ 123,000	434,221,000	(422,127,000)	(2,000)	12,215,000
Balance (in shares) at Sep. 30, 2020	12,303,219
Balance at Jun. 30, 2020	$ 116,000	431,420,000	(415,886,000)	(17,000)	15,633,000
Balance (in shares) at Jun. 30, 2020	11,611,830
Increase (Decrease) in Stockholders' Equity (Deficit)
Net loss			(6,241,000)		(6,241,000)
Other comprehensive income (loss)				15,000	15,000
Stock-based compensation		90,000			90,000
Issuance of common stock upon exercise of warrants	$ 7,000	2,711,000			2,718,000
Issuance of common stock upon exercise of warrants (in shares)	691,389
Balance at Sep. 30, 2020	$ 123,000	434,221,000	(422,127,000)	(2,000)	12,215,000
Balance (in shares) at Sep. 30, 2020	12,303,219
Balance at Dec. 31, 2020	$ 124,000	434,593,000	(428,556,000)	14,000	$ 6,175,000
Balance (in shares) at Dec. 31, 2020	12,396,219				12,396,219
Increase (Decrease) in Stockholders' Equity (Deficit)
Net loss			(12,399,000)		$ (12,399,000)
Other comprehensive income (loss)				(20,000)	(20,000)
Exercise of stock options		24,000			24,000
Exercise of stock options (in shares)	4,642
Stock-based compensation		315,000			315,000
Shares issued in connection with reverse stock split	104
Issuance of common stock, net	$ 83,000	55,008,000			55,091,000
Issuance of common stock, net (in shares)	8,329,598
Issuance of common stock upon exercise of warrants	$ 2,000	478,000			480,000
Issuance of common stock upon exercise of warrants (in shares)	160,000
Balance at Sep. 30, 2021	$ 209,000	490,418,000	(440,955,000)	(6,000)	$ 49,666,000
Balance (in shares) at Sep. 30, 2021	20,890,563				20,890,563
Balance at Jun. 30, 2021	$ 158,000	470,335,000	(437,502,000)	2,000	$ 32,993,000
Balance (in shares) at Jun. 30, 2021	15,781,040
Increase (Decrease) in Stockholders' Equity (Deficit)
Net loss			(3,453,000)		(3,453,000)
Other comprehensive income (loss)				(8,000)	(8,000)
Stock-based compensation		190,000			190,000
Issuance of common stock, net	$ 51,000	19,893,000			19,944,000
Issuance of common stock, net (in shares)	5,109,523
Balance at Sep. 30, 2021	$ 209,000	$ 490,418,000	$ (440,955,000)	$ (6,000)	$ 49,666,000
Balance (in shares) at Sep. 30, 2021	20,890,563				20,890,563

XML

Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net loss	$ (12,399,000)	$ (18,728,000)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	10,000	9,000
Change in fair value of warrant liabilities	(321,000)	63,000
Stock compensation expense	315,000	275,000
Changes in assets and liabilities:
Receivables	8,000	52,000
Prepaid expenses and other current assets	193,000	(107,000)
Other assets	138,000
Accounts payable	(783,000)	1,454,000
Accrued expenses and other current liabilities	(2,213,000)	(456,000)
Deferred revenue	(170,000)	(169,000)
Net cash used in operating activities	(15,222,000)	(17,607,000)
Investing activities:
Payments for purchase of property and equipment		(15,000)
Net cash used in investing activities		(15,000)
Financing activities:
Proceeds from the sale of common stock and warrants, net of costs	55,091,000	9,062,000
Proceeds from the exercise of warrants	480,000	10,016,000
Proceeds from the exercise of stock options	24,000
Net cash provided by financing activities	55,595,000	19,078,000
Effect of foreign currency translation on cash	(20,000)	16,000
Net increase in cash and cash equivalents	40,353,000	1,472,000
Cash and cash equivalents at beginning of period	19,025,000	22,726,000
Cash and cash equivalents at end of period	$ 59,378,000	$ 24,198,000

XML

Nature of Business

9 Months Ended

Sep. 30, 2021

Nature of Business

Nature of Business

1. Nature of Business

The Company

Onconova Therapeutics, Inc. (the “Company”) was incorporated in the State of Delaware on December 22, 1998 and commenced operations on January 1, 1999. The Company’s headquarters are located in Newtown, Pennsylvania. The Company is a clinical-stage biopharmaceutical company focused on discovering and developing novel products for patients with cancer. The Company has proprietary targeted anti-cancer agents designed to disrupt specific cellular pathways that are important for cancer cell proliferation. The Company believes that the product candidates in its pipeline have the potential to be efficacious in a variety of cancers with unmet medical need. The Company has the following two clinical-stage programs: 1. narazaciclib (ON 123300), a multi-kinase inhibitor in solid tumors; and 2. oral rigosertib alone or in combination with PD-1 inhibitors for treatment of KRAS-mutated solid tumors. During 2012, Onconova Europe GmbH was established as a wholly owned subsidiary of the Company for the purpose of further developing business in Europe.

The Company has entered into several license and collaboration agreements. In 2011, the Company entered into a license agreement, as subsequently amended, with SymBio Pharmaceuticals Limited (“SymBio”), which grants SymBio certain rights to commercialize rigosertib in Japan and Korea. In December 2017, the Company entered into a license and collaboration agreement with HanX Biopharmaceuticals, Inc. (“HanX”) for the further development, registration and commercialization of narazaciclib in greater China. Narazaciclib is a preclinical compound which the Company believes has the potential to overcome the limitations of current generation CDK 4/6 inhibitors. Under the terms of the agreement, the Company received an upfront payment, and will receive regulatory and commercial milestone payments, as well as royalties on Chinese sales. The key feature of the collaboration is that HanX provides all funding required for Chinese IND enabling studies performed for Chinese Food and Drug Administration IND approval, which was received in January 2020. The Company and HanX also intended for these studies to comply with the FDA standards for IND approval. Accordingly, such studies were used by the Company for an IND filing with the US FDA in November 2020. The FDA Study May Proceed letter was issued in December 2020. The Company maintains global rights outside of China. On March 2, 2018, the Company entered into a License, Development and Commercialization Agreement (the “Pint License Agreement”) with Pint International SA (which, together with its affiliate Pint Pharma GmbH, are collectively referred to as “Pint”). Under the terms of the agreement, the Company granted Pint an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and commercialize any pharmaceutical product containing rigosertib in all uses of rigosertib in certain Latin American countries. In May 2019, the Company entered into a License and Collaboration Agreement (the “HanX License Agreement”) with HanX. Under the terms of the HanX License Agreement, the Company granted HanX an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and commercialize any pharmaceutical product (the “HanX Product”) containing rigosertib in all uses of rigosertib or the HanX Product in human therapeutic uses in the People’s Republic of China, Hong Kong, Macau and Taiwan (the “HanX Territory”). In connection with the HanX License Agreement, the Company also entered into a Securities Purchase Agreement with each of HanX and Abundant New Investments Ltd. (“Abundant”), an affiliate of HanX (each, a “Securities Purchase Agreement” and together, the “Securities Purchase Agreements”). HanX did not fulfill its obligations under the HanX License Agreement and in January 2020, in accordance with the terms of the HanX License Agreement, the HanX License Agreement was deemed to be void ab initio. Upon this termination, the rights to HanX Product in the HanX Territory reverted to the Company in accordance with the terms of the HanX License Agreement. In addition, the Securities Purchase Agreements terminated automatically effective upon the termination of the HanX License Agreement in accordance with the Securities Purchase Agreements. In November 2019, the Company entered into a Distribution, License and Supply Agreement (the “Knight License Agreement”) with Knight Therapeutics Inc. (“Knight”). Under the terms of the Knight License Agreement, the Company granted Knight (i) a non-exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and manufacture any product (the “Knight Licensed Product”) containing rigosertib for Canada (and Israel, should Knight exercise its option as set forth in the Knight License Agreement) (the “Knight Territory”) and in human uses (the

“Field”), and (ii) an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know-how, to commercialize the Knight Licensed Product in the Knight Territory and in the Field. Knight has also agreed to obtain from the Company all of its requirements of the Knight Licensed Products for the Knight Territory, and the Company has agreed to supply Knight with all of its requirements of the Knight Licensed Products. In December 2019, the Company entered into a Distribution, License and Supply Agreement (the “STA License Agreement”) with Specialised Therapeutics Asia Pte. Ltd. (“STA”). Under the terms of the STA License Agreement, the Company granted STA (i) a non-exclusive, royalty -bearing license, with the right to sublicense, under certain Company patent rights and know-how, to develop and manufacture any product (the “STA Licensed Product”) containing rigosertib for Australia and New Zealand (the “STA Territory”) and in human uses (the “Field”), and (ii) an exclusive, royalty-bearing license, with the right to sublicense, under certain Company patent rights and know- how, to commercialize the STA Licensed Product in the STA Territory and in the Field. STA has also agreed to obtain from the Company all of its requirements of the STA Licensed Products for the STA Territory, and the Company has agreed to supply STA with all of its requirements of the STA Licensed Products.

On May 20, 2021, the Company amended its certificate of incorporation to effect a one-for-fifteen reverse stock split of its common stock. All common stock, equity, share and per share amounts in the financial statements and notes have been retroactively adjusted to reflect this one-for-fifteen reverse stock split.

On May 20, 2021, the Company amended its certificate of incorporation to decrease the number of authorized shares of common stock par value $0.01 per share from 250,000,000 to 125,000,000.

Liquidity

The Company has incurred recurring operating losses since inception. For the nine months ended September 30, 2021, the Company incurred a net loss of $12,399,000 and as of September 30, 2021 the Company had generated an accumulated deficit of $440,955,000. The Company anticipates operating losses to continue for the foreseeable future due to, among other things, costs related to research, development of its product candidates and its preclinical programs, strategic alliances and its administrative organization. At September 30, 2021, the Company had cash and cash equivalents of $59,378,000. The Company will require substantial additional financing to fund its ongoing clinical trials and operations, and to continue to execute its strategy.

On January 11, 2021, the Company closed on an offering of common stock. The Company issued 1,303,408 shares of common stock and net proceeds were approximately $8.5 million. On February 16, 2021, the Company closed on an offering of common stock. The Company issued 1,916,667 shares of common stock and net proceeds were approximately $26.7 million. On September 28, 2021, the Company closed on an offering of common stock. The Company issued 5,000,000 shares of common stock and net proceeds were approximately $19.5 million.

On August 20, 2021, the Company entered into an at-the-market equity distribution agreement for the sale of up to $25.0 million of common stock. Through September 30, 2021, the Company sold 109,523 shares under the agreement at a weighted average price of $5.32 per share. Net proceeds after commissions and offering expenses were approximately $0.5 million.

Following the unsuccessful conclusion of the INSPIRE trial, the Company has taken steps to reduce its cash expenditures. From September 2020 to December 2020, the Company implemented a workforce reduction of employees in research and development who were primarily focused on preparing the NDA for the use of rigosertib in higher risk MDS. In total, 10 employees were terminated, representing approximately 43% of the Company’s workforce. A severance related charge of approximately $1,207,000, which includes a non-cash charge of approximately $29,000 related to the accelerated vesting of outstanding stock options, was recorded in the year ended December 31, 2020. The accrued severance balance was included in accrued expenses and other liabilities on the balance sheet. It was paid in

periodic amounts through September 2021. On October 30, 2020, the Company notified its landlord of its intention to not renew its office space lease. The lease expired in February 2021 and was modified to a month-to-month lease for a portion of the space. The lease terminated in June 2021 and the Company has relocated to temporary office space with all employees working remotely.

The Company has and may continue to delay, scale-back, or eliminate certain of its research and development activities and other aspects of its operations until such time as the Company is successful in securing additional funding. The Company is exploring various dilutive and non-dilutive sources of funding, including equity financings, strategic alliances, business development and other sources. The future success of the Company is dependent upon its ability to obtain additional funding. There can be no assurance, however, that the Company will be successful in obtaining such funding in sufficient amounts, on terms acceptable to the Company, or at all. The Company believes that its cash and cash equivalents will be sufficient to fund its ongoing trials and business operations for more than twelve months from the date of this filing.

COVID-19

While the Company is not aware of a material impact from the novel coronavirus disease (“COVID-19”) pandemic through September 30, 2021, the full extent to which COVID-19 will directly or indirectly impact the Company’s business, results of operations and financial condition, including manufacturing, clinical trials and research and development costs, depends on future developments that are highly uncertain at this time.

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2021

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) for interim financial information. Certain information and footnotes normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The financial statements include the consolidated accounts of the Company and its wholly-owned subsidiary, Onconova Europe GmbH. All significant intercompany transactions have been eliminated.

Unaudited Interim Financial Information

The accompanying condensed consolidated balance sheet as of September 30, 2021, the condensed consolidated statements of operations and comprehensive loss for the three and nine months ended September 30, 2021 and 2020, the consolidated statements of stockholders’ equity (deficit) for the three and nine months ended September 30, 2021 and 2020 and the condensed consolidated statements of cash flows for the nine months ended September 30, 2021 and 2020 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of September 30, 2021, the results of its operations for the three and nine months ended September 30, 2021 and 2020, and its cash flows for the nine months ended September 30, 2021 and 2020. The financial data and other information disclosed in these notes related to the three and nine months ended September 30, 2021 and 2020 are unaudited. The results for the three and nine months ended September 30, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021, any other interim periods, or any future year or period. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the year ended December 31, 2020 included in the Company’s annual report on Form 10-K filed with the SEC on March 18, 2021.

All common stock, equity, share and per share amounts in the financial statements and notes have been retroactively adjusted to reflect a one-for-fifteen reverse stock split which was effective May 20, 2021.

Segment Information

Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company views its operations and manages its business in one segment, which is the identification and development of oncology therapeutics.

Significant Accounting Policies

The Company’s significant accounting policies are disclosed in the audited consolidated financial statements for the year ended December 31, 2020 included in the Company’s annual report on Form 10-K filed with the SEC on March 18, 2021. Since the date of such financial statements, there have been no changes to the Company’s significant accounting policies.

Fair Value Measurements

The carrying amounts reported in the accompanying consolidated financial statements for cash and cash equivalents, accounts payable, and accrued liabilities approximate their respective fair values because of the short-term nature of these accounts. The fair value of the warrant liability is discussed in Note 7, “Fair Value Measurements.”

Recent Accounting Pronouncements

In June 2016, the FASB issued new guidance on the accounting for credit losses on financial instruments. The guidance was amended in November 2019. The new guidance introduces an expected loss model for estimating credit losses, replacing the incurred loss model. The new guidance also changes the impairment model for available-for-sale debt securities, requiring the use of an allowance to record estimated credit losses (and subsequent recoveries). The guidance is effective for the Company in fiscal years beginning after December 15, 2022, and interim periods within those years, with early adoption permitted. The Company is evaluating the impact of the adoption of the standard on its consolidated financial statements.

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Revenue

9 Months Ended

Sep. 30, 2021

Revenue.

Revenue

3. Revenue

The Company’s revenue during the three and nine months ended September 30, 2021 and 2020 was from its license and collaboration agreement with SymBio.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Symbio
Upfront license fee recognition over time	$	57,000	$	56,000	$	170,000	$	169,000
Supplies		—		10,000		—		5,000
	$	57,000	$	66,000	$	170,000	$	174,000

Deferred revenue is as follows:

	Symbio
	Upfront Payment
Deferred balance at December 31, 2020	$	3,695,000
Recognition to revenue		170,000
Deferred balance at September 30, 2021	$	3,525,000

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Net Loss Per Share of Common Stock

9 Months Ended

Sep. 30, 2021

Net Loss Per Share of Common Stock

Net Loss Per Share of Common Stock

4. Net Loss Per Share of Common Stock

The following potentially dilutive securities outstanding at September 30, 2021 and 2020 have been excluded from the computation of diluted weighted average shares outstanding, as they would be antidilutive (reflects the number of common shares as if the dilutive securities had been converted to common stock):

	September 30,
	2021	2020
Warrants	496,586	766,091
Stock options	438,006	66,933
	934,592	833,024

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Warrants

9 Months Ended

Sep. 30, 2021

Warrants

Warrants

5. Warrants

Common Stock warrants are accounted for in accordance with applicable accounting guidance provided in ASC Topic 815, Derivatives and Hedging - Contracts in Entity’s Own Equity (ASC Topic 815), as either derivative liabilities or as equity instruments depending on the specific terms of the warrant agreement. Some of the Company’s warrants are classified as liabilities because in certain circumstances they could require cash settlement.

Warrants outstanding and warrant activity (reflects the number of common shares as if the warrants were converted to common stock) for the nine months ended September 30, 2021 is as follows:

					Balance				Balance
		Exercise		Expiration	December 31,	Warrants	Warrants	Warrants	September 30,
Description	Classification	Price		Date	2020	Issued	Exercised	Expired	2021
Non-tradable warrants	Liability	$	2,587.50	July 2021	430	—	—	(430)	—
Tradable warrants	Liability	$	1,107.00	July 2021	14,187	—	—	(14,187)	—
Non-tradable pre-funded warrants	Equity	$	2.25	July 2023	26	—	—	—	26
Non-tradable warrants	Equity	$	24.00	December 2022	26,189	—	—	—	26,189
Non-tradable warrants	Equity	$	211.50	March 2021	333	—	—	(333)	—
Non-tradable warrants	Equity	$	317.25	March 2021	556	—	—	(556)	—
Non-tradable warrants	Equity	$	116.8425	June 2021	1,000	—	—	(1,000)	—
Non-tradable pre-funded warrants	Equity	$	2.25	none	3,522	—	—	—	3,522
Non-tradable warrants	Equity	$	24.00	December 2022	120,407	—	—	—	120,407
Non-tradable pre-funded warrants	Equity	$	2.25	none	4,974	—	—	—	4,974
Non-tradable warrants	Equity	$	30.00	September 2023	7,306	—	—	—	7,306
Non-tradable warrants	Equity	$	3.00	November 2024	409,500	—	(160,000)	—	249,500
Non-tradable warrants	Equity	$	6.54375	December 2024	16,953	—	—	—	16,953
Non-tradable warrants	Equity	$	6.75450	December 2024	46,263	—	—	—	46,263
Non-tradable warrants	Equity	$	6.77850	December 2023	29,968	—	—	—	29,968
					681,614	—	(160,000)	(16,506)	505,108

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Balance Sheet Detail

9 Months Ended

Sep. 30, 2021

Balance Sheet Detail

Balance Sheet Detail

6. Balance Sheet Detail

Prepaid expenses and other current assets:

	September 30,		December 31,
	2021		2020
Research and development	$	22,000	$	189,000
Manufacturing		158,000		90,000
Insurance		252,000		263,000
Other		97,000		180,000
	$	529,000	$	722,000

Property and equipment:

	September 30,		December 31,
	2021		2020
Property and equipment	$	70,000	$	70,000
Accumulated depreciation		(28,000)		(18,000)
	$	42,000	$	52,000

Accrued expenses and other current liabilities:

	September 30,		December 31,
	2021		2020
Research and development	$	1,750,000	$	2,541,000
Employee compensation		888,000		2,239,000
Professional fees		111,000		182,000
	$	2,749,000	$	4,962,000

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Fair Value Measurements

9 Months Ended

Sep. 30, 2021

Fair Value Measurements

Fair Value Measurements

7. Fair Value Measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The Company utilizes a valuation hierarchy for disclosure of the inputs to the valuations used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the Company’s own assumptions used to measure assets and liabilities at fair value. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

On January 5, 2016, the Company entered into a securities purchase agreement (the “Securities Purchase Agreement”) with an institutional investor providing for the issuance and sale by the Company of 861 shares of Common Stock, at a purchase price of $2,137.50 per share and warrants to purchase up to 430 shares of Common Stock (the “Warrants”) for aggregate gross proceeds of $1,840,000. The Company classified the warrants as a liability (see Note 5). The estimated fair value using the Black-Scholes pricing model was approximately $0 at September 30, 2021 and December 31, 2020. These warrants expired in July 2021.

On July 29, 2016 the Company closed on a Rights Offering, issuing 16,000 shares of Common Stock, 14,187 Tradable Warrants and 2,918 Pre-Funded Warrants. The Tradable Warrants were exercisable for a period of five years for one share of Common Stock at an exercise price of $1,107 per share. The Company classified the Tradable Warrants as a liability (see Note 5). The Tradable Warrants were listed on the Nasdaq Capital Market. The Company determined that an active and orderly market for the Tradable Warrants developed and that the Nasdaq Capital Market price was the best indicator of fair value of the warrant liability. The quoted market price was used to determine the fair value at December 31, 2020. These warrants expired in July 2021.

The following fair value hierarchy table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020:

	Fair Value Measurement as of:
	September 30, 2021								December 31, 2020
	Level 1		Level 2		Level 3		Balance		Level 1		Level 2		Level 3		Balance
Tradable warrants liability	$	—	$	—	$	—	$	—	$	321,000	$	—	$	—	$	321,000
Non-tradable warrants liability		—		—		—		—		—		—		—		—
Total	$	—	$	—	$	—	$	—	$	321,000	$	—	$	—	$	321,000

There were no transfers between levels in any of the periods reported.

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2021

Stock-Based Compensation

Stock-Based Compensation

8. Stock-Based Compensation

The 2018 Omnibus Incentive Compensation Plan (the “2018 Plan”) was unanimously approved by the Company’s Board of Directors on May 24, 2018 and was approved by the Company’s stockholders on June 27, 2018.

Under the 2018 Plan, the Company may grant incentive stock options, non-qualified stock options, stock awards, stock units, stock appreciation rights and other stock-based awards to employees, non-employee directors and consultants, and advisors. The maximum aggregate number of shares of the Company’s common stock that may be issued under the 2018 Plan is 26,823.

The 2018 Plan was amended and restated following unanimous approval of the Company’s Board of Directors on April 24, 2019 and was approved by the Company’s shareholders on June 17, 2019. The amended 2018 Plan (the “Amended Plan”) allowed for an additional 39,300 shares of the Company’s common stock that may be issued under the Amended Plan with respect to awards made on and after June 17, 2019.

The 2021 Incentive Compensation Plan (the “2021 Plan”) was unanimously approved by the Company’s shareholders on July 30, 2021. Upon stockholders’ approval of the 2021 Plan, no further awards will be made under the amended 2018 Plan. Under the 2021 Plan, the Company may grant incentive stock options, non-qualified stock options, stock awards, stock units, stock appreciation rights and other stock-based awards to employees, non-employee directors and consultants, and advisors. The maximum aggregate number of shares of the Company’s common stock that may be issued under the 2021 Plan is 1,300,000. At September 30, 2021, there were 917,094 shares available for future issuance.

Stock-based compensation expense includes stock options granted to employees and non-employees and has been reported in the Company’s statements of operations and comprehensive loss in either research and development expenses or general and administrative expenses depending on the function performed by the optionee. No net tax benefits related to the stock-based compensation costs have been recognized since the Company’s inception. The

Company recognized stock-based compensation expense related to stock options and restricted stock units as follows for the three and nine months ended September 30, 2021 and 2020:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
General and administrative	$	153,000	$	51,000	$	270,000	$	142,000
Research and development		29,000		39,000		45,000		133,000
	$	182,000	$	90,000	$	315,000	$	275,000

A summary of stock option activity for the nine months ended September 30, 2021 is as follows:

		Options Outstanding
					Weighted
			Weighted-		Average
	Shares		Average		Remaining	Aggregate
	Available	Number	Exercise		Contractual	Intrinsic
	for Grant	of Shares	Price		Term (in years)	Value
Balance, December 31, 2020	12,339	57,939	$	368.10	8.38	$	—
Authorized	1,300,000	—
Granted	(398,575)	398,575	$	5.29	9.83		—
Exercised	—	(4,642)	$	4.65	8.47	$	21,636
Forfeitures	3,330	(13,866)	$	940.63	7.11
Balance, September 30, 2021	917,094	438,006	$	21.55	9.65	$	—
Vested or expected to vest, September 30, 2021		420,868	$	21.55	9.65	$	—
Exercisable at September 30, 2021		24,261	$	297.34	7.62	$	—

The Company accounts for all stock-based payments made to employees, non-employees and directors using an option pricing model for estimating fair value. Accordingly, stock-based compensation expense is measured based on the estimated fair value of the awards on the date of grant, net of forfeitures. Compensation expense is recognized for the portion that is ultimately expected to vest over the period during which the recipient renders the required services to the Company using the straight-line single option method.

The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock options at the grant date. The Black-Scholes model requires the Company to make certain estimates and assumptions, assumptions related to the expected price volatility of the Common Stock, the period during which the options will be outstanding, the rate of return on risk-free investments and the expected dividend yield for the Company’s stock.

As of September 30, 2021, there was $1,897,000 of unrecognized compensation expense related to the unvested stock options which is expected to be recognized over a weighted-average period of approximately 2.24 years.

The weighted-average assumptions underlying the Black-Scholes calculation of grant date fair value include the following:

	Nine months ended September 30,
	2021			2020
Risk-free interest rate		0.89	%		0.44	%
Expected volatility		133.83	%		106.38	%
Expected term		5.93	years		6.00	years
Expected dividend yield		0	%		0	%
Weighted average grant date fair value	$	4.59		$	3.75

The weighted-average valuation assumptions were determined as follows:

● Risk-free interest rate: The Company based the risk-free interest rate on the interest rate payable on U.S. Treasury securities in effect at the time of grant for a period that is commensurate with the assumed expected option term.

● Expected term of options: Due to its lack of sufficient historical data, the Company estimates the expected life of its employee stock options using the “simplified” method, as prescribed in Staff Accounting Bulletin (SAB) No. 107, whereby the expected life equals the arithmetic average of the vesting term and the original contractual term of the option.

● Expected stock price volatility: Expected volatility is based on the historical volatility of the Company’s Common Stock since its IPO in July 2013.

● Expected annual dividend yield: The Company has never paid, and does not expect to pay, dividends in the foreseeable future. Accordingly, the Company assumed an expected dividend yield of 0.0%.

● Estimated forfeiture rate: The Company’s estimated annual forfeiture rate on stock option grants was 4.14% in 2021 and 2020, based on the historical forfeiture experience.

On August 2, 2021, the compensation committee of the board of directors approved restricted stock unit grants to the Company’s employees (“2021 RSU”). An aggregate of 104,700 service-based RSUs were issued at a grant date fair value of $5.19. The 2021 RSU awards will be settled in stock, vest 33% on each of the the first and second anniversary of the date of grant, and vest 34% on the third anniversary of the date of grant. The 2021 RSU awards were granted under the 2021 Plan. There were no vesting events, expirations, forfeitures, or cancelations of the 2021 RSUs during the period. At September 30, 2021, the unrecognized compensation cost related to unvested service-based RSUs was $513,000, which will be recognized over the remaining service period. During the nine months ended September 30, 2021, the Company recognized $30,000 of stock-based compensation expense related to the 2021 RSUs, which is included in additional paid-in capital.

Grants of PSUs and SARs

On July 9, 2020, the compensation committee of the board of directors and the board approved a cash bonus program of cash-settled stock appreciation right (“2020 SAR”) awards and cash-settled performance stock unit (“2020 PSU”) awards to the Company’s employees. An aggregate of 2020 SAR awards with respect to 256,713 shares of common stock and 2020 PSU awards with respect to 124,220 shares of common stock were granted to the Company’s employees. The 2020 SAR awards will be settled in cash, vest 33% on the first anniversary of the date of grant, and the remaining 67% monthly over the next 24 months, have a per-share base amount of $8.40, which was the closing sales price of a share of the Company’s common stock on the grant date, and are in all cases subject to the terms and conditions of the Company’s form of SAR award agreement. The 2020 SAR awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

The 2020 PSU awards vest 50% upon the submission of a new drug application (“NDA”) to the U.S. FDA for rigosertib in higher-risk myelodysplastic syndromes (“HR-MDS”) and 50% upon U.S. FDA approval of rigosertib for HR-MDS. The 2020 PSU awards have a maximum value of $21.60 per share. The maximum price per share is the per-share value based on the Company’s market capitalization at $250 million and the Company’s outstanding shares of common stock, which was 11,611,829 shares on July 9, 2020. In all cases, the 2020 PSU awards are subject to the terms and conditions of the Company’s form of PSU award agreement. The 2020 PSU awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

In addition, on July 9, 2020, based on the recommendation of the compensation committee, the board approved a change in the non-employee director compensation policy that would provide for an annual SAR award (“2020 Director SAR”) with respect to 8,333 shares of common stock for each of the Company’s non-employee directors. No other changes to the non-employee director compensation policy were approved and, on July 9, 2020, the Board approved the initial 8,333 2020 Director SAR award to each of the non-employee directors for an aggregate total of 58,333 2020 Directors SAR awards granted. The 2020 Director SAR awards vest on the first anniversary of grant subject to the director’s continued service and will be settled in cash, have a per-share base amount of $8.40, and are in all cases subject to the terms and conditions of the Company’s form of 2020 Director SAR award agreement.

Each SAR subject to a 2020 SAR award represents the right to a cash payment equal to the excess, if any, of (i) the fair market value of each underlying share of the Company’s common stock, determined on the date of exercise of the SAR minus (ii) the base amount. Pursuant to the terms of the SAR awards, in no event may the cash payment for each SAR exceed $13.20, which is the maximum price per share of $21.60, minus the base amount of $8.40, subject to adjustment in accordance with the terms of the Stock Appreciation Right Award Agreement. The maximum price per share is the per-share value based on the Company’s market capitalization at $250 million and the Company’s outstanding shares of common stock, which was 11,611,829 shares on July 9, 2020.

On February 17, 2021, the compensation committee of the board of directors and the board approved a cash bonus program of cash-settled stock appreciation right (“2021 SAR”) awards and cash-settled performance stock unit (“2021 PSU”) awards to the Company’s employees. An aggregate of 2021 SAR awards with respect to 100,000 shares of common stock and 2021 PSU awards with respect to 100,000 shares of common stock were granted to the Company’s employees. The 2021 SAR awards will be settled in cash, vest 33% on the first anniversary of the date of grant, and the remaining 67% monthly over the next 24 months, have a per-share base amount of $22.65, which was the closing sales price of a share of the Company’s common stock on the grant date, and are in all cases subject to the terms and conditions of the Company’s form of SAR award agreement. Each SAR subject to a 2021 SAR award represents the right to a cash payment equal to the excess, if any, of (i) the fair market value of each underlying share of the Company’s common stock, determined on the date of exercise of the 2021 SAR minus (ii) the base amount. Pursuant to the terms of the 2021 SAR awards, in no event may the cash payment for each SAR exceed $15.45, which is the maximum price per share of $38.10, minus the base amount of $22.65, subject to adjustment in accordance with the terms of the Stock Appreciation Right Award Agreement. The maximum price per share is the per-share value based on the Company’s market capitalization at $600 million and the Company’s outstanding shares of common stock, which was 15,767,492 shares on February 17, 2021. The 2021 SAR awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

The 2021 PSU awards vest 20% upon the initiation of a new clinical program with an in-licensed compound, 20% for reaching the recommended Phase 2 dose for any compound, 20% for the first patient enrolled in the expansion cohort of the Phase 1 ON123300 clinical trial, 20% for the first patient enrolled in a registrational study for any compound, and 20% for the topline data of a registrational study for any compound. The 2021 PSU awards have a maximum value of $38.10 per share. The maximum price per share is the per-share value based on the Company’s approximate market capitalization at $600 million and the Company’s outstanding shares of common stock, which was 15,767,492 shares on February 17, 2021. In all cases, the 2021 PSU awards are subject to the terms and conditions of

the Company’s form of PSU award agreement. The 2021 PSU awards are cash-settled and were granted outside of the 2018 Plan and the 2021 Plan.

The fair value of the 2021 SARs granted has been estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions:

	Nine months ended
	September 30, 2021
Risk-free interest rate		0.95	%
Expected volatility		129.79	%
Expected term		6.5 years
Expected dividend yield		0	%
Weighted average grant date fair value	$	0.62

During the nine months ended September 30, 2021, the Company recognized $528,000 of compensation expense related to the SARs and PSUs. Included in compensation expense related to SARs is $442,000 of expense resulting from the exercise of 2020 SARs during February 2021. As of September 30, 2021, the SARs and PSUs liability was $86,000 and is included in accrued expenses. As of September 30, 2021, there was $28,000 of unrecognized compensation cost related to the 2020 SARs and PSUs and $350,000 of unrecognized compensation cost related to the 2021 SARs and PSUs.

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Research Agreements

9 Months Ended

Sep. 30, 2021

Research Agreements

Research Agreements

9. Research Agreements

The Company has entered into various licensing and right-to-sublicense agreements with educational institutions for the exclusive use of patents and patent applications, as well as any patents that may develop from research being conducted by such educational institutions in the field of anticancer therapy, genes and proteins. Results from this research have been licensed to the Company pursuant to these agreements. Under one of these agreements with Temple University (“Temple”), the Company is required to make annual maintenance payments to Temple and royalty payments based upon a percentage of sales generated from any products covered by the licensed patents, with minimum specified royalty payments. As no sales had been generated through September 30, 2021 under the licensed patents, the Company has not incurred any royalty expenses related to this agreement. In addition, the Company is required to pay Temple a percentage of any sublicensing fees received by the Company.

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Related-Party Transactions

9 Months Ended

Sep. 30, 2021

Related-Party Transactions

Related-Party Transactions

10. Related-Party Transactions

The Company entered into a research agreement, as subsequently amended, with the Mount Sinai School of Medicine (“Mount Sinai”), with which a former member of its board of directors and a stockholder is affiliated. The agreement expired in June 2020 and was not renewed. The board member left the Company’s board in August 2020. Mount Sinai is undertaking research on behalf of the Company on the terms set forth in the agreements. Mount Sinai, in connection with the Company, will prepare applications for patents generated from the research. Results from all projects will belong exclusively to Mount Sinai, but the Company will have an exclusive option to license any inventions. Payments to Mount Sinai under this research agreement for both the three months ended September 30, 2021 and 2020 were $0, and for the nine months ended September 30, 2021 and 2020 were $0 and $201,000, respectively. At both September 30, 2021 and December 31, 2020, the Company had $77,000 payable to Mount Sinai under this agreement.

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Securities Registrations and Sales Agreements

9 Months Ended

Sep. 30, 2021

Securities Registrations and Sales Agreements

Securities Registrations and Sales Agreements

11. Securities Registrations and Sales Agreements

January 2020 Offering

On December 31, 2019, the Company entered into definitive securities purchase agreements with institutional investors for the issuance and sale in a registered direct offering of 1,844,168 shares of the Company's common stock at an offering price of $5.4225 per share.

Pursuant to the December 2019 HCW Engagement Letter, HCW agreed to serve as exclusive placement agent for the offering. In connection with the offering, the Company paid HCW an aggregate cash fee equal to 7.0% of the gross proceeds in the offering, management fee equal to 1.0% of the gross proceeds raised in the offering, $85,000 for non-accountable expenses; and $10,000 for clearing fees. The Company also issued to HCW or its designees placement agent warrant to purchase up to 92,208 shares of common stock at an exercise price of $6.7785 per share. The placement agent warrants are immediately exercisable and will expire on December 31, 2023.

The net proceeds to the Company from the offering, after deducting HCW's placement agent fees and expenses and other estimated offering expenses payable by the Company were approximately $9.0 million and were received in January 2020.

The offering was pursuant to a prospectus dated December 28, 2017, and a prospectus supplement dated as of December 31, 2019 filed in connection with a takedown from the Company's shelf registration statement on Form S-3 (File No. 333-221684). The offering closed on January 3, 2020.

January 7, 2021 Offering

On January 7, 2021, the Company entered into a purchase agreement with certain institutional and accredited investors for the sale of an aggregate of 1,303,408 shares of the Company’s common stock, at a purchase price of $6.675 per share.

Under the purchase agreement, subject to certain exceptions, the Company is prohibited from effecting or entering into an agreement to effect any “variable rate transactions” as defined in the purchase agreement for a period of five years following the closing of the offering.

In connection with the offering, pursuant to the purchase agreement we reimbursed Lincoln Park Capital Fund, LLC, as the lead investor (“Lincoln Park”), an aggregate of $100,000 for expenses incurred in connection with the offering, including any due diligence expenses and legal fees. Furthermore, pursuant to the purchase agreement, we have granted Lincoln Park certain rights to participate at fair value with other investors in up to 50% of the amount of any future offerings of common stock or securities exercisable for or convertible into common stock that the Company seeks to complete within one year after the closing of the offering, other than a firm commitment public offering.

The net proceeds to the Company from the offering, after deducting Lincoln Park’s expenses and other estimated offering expenses payable by the Company were approximately $8.5 million.

The shares sold in the offering were offered and sold by the Company directly to the investors, without a placement agent, underwriter, broker or dealer, pursuant to an effective shelf registration statement on Form S-3 (File No. 333-237844) declared effective by the SEC on May 18, 2020, and the base prospectus contained therein. The offering closed on January 11, 2021.

February 10, 2021 Offering

On February 10, 2021, the Company entered into an underwriting agreement with Guggenheim Securities, LLC, as representative of several underwriters, for the public offering of 1,666,667 shares of the Company’s common stock, at a public offering price of $15.00 per share. Under the terms of the underwriting agreement, the Company granted the underwriters an option, exercisable for 30 days, to purchase up to an additional 250,000 shares of common stock at the same price. The option was exercised prior to closing.

In connection with the offering, the Company paid the underwriters a cash fee equal to 6% of the gross proceeds in the offering and $100,000 in legal fees and expenses.

The net proceeds to the Company from the offering, including exercise of the underwriters’ option, were approximately $26.7 million, after deducting fees and estimated offering expenses payable by the Company.

The offering was made pursuant to a registration statement (No. 333-237844) on Form S-3, which was initially filed by the Company with the SEC on April 24, 2020, amended on Form S-3/A that was filed with the SEC on May 15, 2020, and was declared effective by the SEC on May 18, 2020. The offering closed on February 16, 2021.

August 20, 2021

On August 20, 2021, the Company entered into an Equity Distribution Agreement (the “Equity Distribution Agreement”) with Piper Sandler & Co. (“Piper Sandler”) under which the Company may offer and sell, from time to time at its sole discretion, shares of the Company’s common stock, with aggregate gross sales proceeds of up to $25.0 million through an “at the market” equity offering program under which Piper Sandler is the sales agent.

Under the Equity Distribution Agreement, the Company has the right to set the parameters for the sale of shares, including the number of shares to be issued, the time period during which sales are requested to be made, limitations on the number of shares that may be sold in any one trading day and any minimum price below which sales may not be made. Subject to the terms and conditions of the Equity Distribution Agreement, Piper Sandler may sell the shares by methods deemed to be an “at the market” offering as defined in Rule 415 promulgated under the Securities Act of 1933, as amended, including sales made through The Nasdaq Capital Market or any other trading market for our common stock. The Equity Distribution Agreement provides that Piper Sandler is entitled to compensation for its services equal to 3.0% of the gross proceeds of any shares of common stock sold through Piper Sandler under the Equity Distribution Agreement. The Company has no obligation to sell any shares under the Equity Distribution Agreement, and may at any time suspend solicitation and offers under the Equity Distribution Agreement. Through September 30, 2021, the Company sold 109,523 shares under the agreement at a weighted average price of $5.32 per share. Net proceeds after commissions and offering expenses were approximately $0.5 million.

The shares are issued pursuant to the Company’s shelf registration statement on Form S-3 (File No. 333-237844). The Company filed a prospectus supplement, dated August 20, 2021 with the Securities and Exchange Commission in connection with the offer and sale of the shares pursuant to the Equity Distribution Agreement.

September 23, 2021 Offering

On September 23, 2021, the Company entered into an underwriting agreement with Guggenheim Securities, LLC, as representative of several underwriters, for the public offering of 5,000,000 shares of the Company’s common stock, at a public offering price of $4.20 per share. Under the terms of the underwriting agreement, the Company granted the underwriters an option, exercisable for 30 days, to purchase up to an additional 750,000 shares of common stock at the same price. The option was not exercised.

In connection with the offering, the Company paid the underwriters a cash fee equal to 6% of the gross proceeds in the offering and $100,000 in legal fees and expenses.

The net proceeds to the Company from the offering, including exercise of the underwriters’ option, were approximately $19.5 million, after deducting fees and estimated offering expenses payable by the Company.

The offering was made pursuant to a registration statement (No. 333-237844) on Form S-3, which was initially filed by the Company with the SEC on April 24, 2020, amended on Form S-3/A that was filed with the SEC on May 15, 2020, and was declared effective by the SEC on May 18, 2020. The offering closed on September 28, 2021.

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Subsequent Events

9 Months Ended

Sep. 30, 2021

Subsequent Events

Subsequent Events

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Summary of Significant Accounting Policies

Basis of Presentation

Basis of Presentation

The condensed consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) for interim financial information. Certain information and footnotes normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The financial statements include the consolidated accounts of the Company and its wholly-owned subsidiary, Onconova Europe GmbH. All significant intercompany transactions have been eliminated.

Unaudited Interim Financial Information

Unaudited Interim Financial Information

The accompanying condensed consolidated balance sheet as of September 30, 2021, the condensed consolidated statements of operations and comprehensive loss for the three and nine months ended September 30, 2021 and 2020, the consolidated statements of stockholders’ equity (deficit) for the three and nine months ended September 30, 2021 and 2020 and the condensed consolidated statements of cash flows for the nine months ended September 30, 2021 and 2020 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of September 30, 2021, the results of its operations for the three and nine months ended September 30, 2021 and 2020, and its cash flows for the nine months ended September 30, 2021 and 2020. The financial data and other information disclosed in these notes related to the three and nine months ended September 30, 2021 and 2020 are unaudited. The results for the three and nine months ended September 30, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021, any other interim periods, or any future year or period. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the year ended December 31, 2020 included in the Company’s annual report on Form 10-K filed with the SEC on March 18, 2021.

All common stock, equity, share and per share amounts in the financial statements and notes have been retroactively adjusted to reflect a one-for-fifteen reverse stock split which was effective May 20, 2021.

Segment Information

Segment Information

Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company views its operations and manages its business in one segment, which is the identification and development of oncology therapeutics.

Significant Accounting Policies

Significant Accounting Policies

The Company’s significant accounting policies are disclosed in the audited consolidated financial statements for the year ended December 31, 2020 included in the Company’s annual report on Form 10-K filed with the SEC on March 18, 2021. Since the date of such financial statements, there have been no changes to the Company’s significant accounting policies.

Fair Value Measurements

Fair Value Measurements

The carrying amounts reported in the accompanying consolidated financial statements for cash and cash equivalents, accounts payable, and accrued liabilities approximate their respective fair values because of the short-term nature of these accounts. The fair value of the warrant liability is discussed in Note 7, “Fair Value Measurements.”

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In June 2016, the FASB issued new guidance on the accounting for credit losses on financial instruments. The guidance was amended in November 2019. The new guidance introduces an expected loss model for estimating credit losses, replacing the incurred loss model. The new guidance also changes the impairment model for available-for-sale debt securities, requiring the use of an allowance to record estimated credit losses (and subsequent recoveries). The guidance is effective for the Company in fiscal years beginning after December 15, 2022, and interim periods within those years, with early adoption permitted. The Company is evaluating the impact of the adoption of the standard on its consolidated financial statements.

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Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue.

Schedule of recognized revenue under funding, license and collaboration agreements

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Symbio
Upfront license fee recognition over time	$	57,000	$	56,000	$	170,000	$	169,000
Supplies		—		10,000		—		5,000
	$	57,000	$	66,000	$	170,000	$	174,000

Schedule of deferred revenue

	Symbio
	Upfront Payment
Deferred balance at December 31, 2020	$	3,695,000
Recognition to revenue		170,000
Deferred balance at September 30, 2021	$	3,525,000

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Net Loss Per Share of Common Stock (Tables)

9 Months Ended

Sep. 30, 2021

Net Loss Per Share of Common Stock

Schedule of antidilutive securities which have been excluded from the computation of diluted weighted average shares outstanding

	September 30,
	2021	2020
Warrants	496,586	766,091
Stock options	438,006	66,933
	934,592	833,024

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Warrants (Tables)

9 Months Ended

Sep. 30, 2021

Warrants

Schedule of warrants outstanding and warrant activity

					Balance				Balance
		Exercise		Expiration	December 31,	Warrants	Warrants	Warrants	September 30,
Description	Classification	Price		Date	2020	Issued	Exercised	Expired	2021
Non-tradable warrants	Liability	$	2,587.50	July 2021	430	—	—	(430)	—
Tradable warrants	Liability	$	1,107.00	July 2021	14,187	—	—	(14,187)	—
Non-tradable pre-funded warrants	Equity	$	2.25	July 2023	26	—	—	—	26
Non-tradable warrants	Equity	$	24.00	December 2022	26,189	—	—	—	26,189
Non-tradable warrants	Equity	$	211.50	March 2021	333	—	—	(333)	—
Non-tradable warrants	Equity	$	317.25	March 2021	556	—	—	(556)	—
Non-tradable warrants	Equity	$	116.8425	June 2021	1,000	—	—	(1,000)	—
Non-tradable pre-funded warrants	Equity	$	2.25	none	3,522	—	—	—	3,522
Non-tradable warrants	Equity	$	24.00	December 2022	120,407	—	—	—	120,407
Non-tradable pre-funded warrants	Equity	$	2.25	none	4,974	—	—	—	4,974
Non-tradable warrants	Equity	$	30.00	September 2023	7,306	—	—	—	7,306
Non-tradable warrants	Equity	$	3.00	November 2024	409,500	—	(160,000)	—	249,500
Non-tradable warrants	Equity	$	6.54375	December 2024	16,953	—	—	—	16,953
Non-tradable warrants	Equity	$	6.75450	December 2024	46,263	—	—	—	46,263
Non-tradable warrants	Equity	$	6.77850	December 2023	29,968	—	—	—	29,968
					681,614	—	(160,000)	(16,506)	505,108

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Balance Sheet Detail (Tables)

9 Months Ended

Sep. 30, 2021

Balance Sheet Detail

Schedule of prepaid expenses and other current assets

	September 30,		December 31,
	2021		2020
Research and development	$	22,000	$	189,000
Manufacturing		158,000		90,000
Insurance		252,000		263,000
Other		97,000		180,000
	$	529,000	$	722,000

Schedule of property and equipment

	September 30,		December 31,
	2021		2020
Property and equipment	$	70,000	$	70,000
Accumulated depreciation		(28,000)		(18,000)
	$	42,000	$	52,000

Schedule of accrued expenses and other current liabilities

	September 30,		December 31,
	2021		2020
Research and development	$	1,750,000	$	2,541,000
Employee compensation		888,000		2,239,000
Professional fees		111,000		182,000
	$	2,749,000	$	4,962,000

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Measurements

Schedule of financial assets and liabilities measured at fair value on a recurring basis

	Fair Value Measurement as of:
	September 30, 2021								December 31, 2020
	Level 1		Level 2		Level 3		Balance		Level 1		Level 2		Level 3		Balance
Tradable warrants liability	$	—	$	—	$	—	$	—	$	321,000	$	—	$	—	$	321,000
Non-tradable warrants liability		—		—		—		—		—		—		—		—
Total	$	—	$	—	$	—	$	—	$	321,000	$	—	$	—	$	321,000

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Stock-Based Compensation

Schedule of stock-based compensation expense

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
General and administrative	$	153,000	$	51,000	$	270,000	$	142,000
Research and development		29,000		39,000		45,000		133,000
	$	182,000	$	90,000	$	315,000	$	275,000

Schedule of stock option activity

		Options Outstanding
					Weighted
			Weighted-		Average
	Shares		Average		Remaining	Aggregate
	Available	Number	Exercise		Contractual	Intrinsic
	for Grant	of Shares	Price		Term (in years)	Value
Balance, December 31, 2020	12,339	57,939	$	368.10	8.38	$	—
Authorized	1,300,000	—
Granted	(398,575)	398,575	$	5.29	9.83		—
Exercised	—	(4,642)	$	4.65	8.47	$	21,636
Forfeitures	3,330	(13,866)	$	940.63	7.11
Balance, September 30, 2021	917,094	438,006	$	21.55	9.65	$	—
Vested or expected to vest, September 30, 2021		420,868	$	21.55	9.65	$	—
Exercisable at September 30, 2021		24,261	$	297.34	7.62	$	—

Schedule of weighted-average assumptions used for estimating the fair value of the stock compensation granted

	Nine months ended September 30,
	2021			2020
Risk-free interest rate		0.89	%		0.44	%
Expected volatility		133.83	%		106.38	%
Expected term		5.93	years		6.00	years
Expected dividend yield		0	%		0	%
Weighted average grant date fair value	$	4.59		$	3.75

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Nature of Business (Details)								1 Months Ended	3 Months Ended		4 Months Ended	9 Months Ended		12 Months Ended
	Sep. 28, 2021 USD ($) shares	Aug. 20, 2021 USD ($)	May 20, 2021 $ / shares shares	Feb. 16, 2021 USD ($) shares	Jan. 11, 2021 USD ($) shares	Jul. 29, 2016 shares	Jan. 05, 2016 USD ($) shares	Sep. 30, 2021 USD ($) Program $ / shares shares	Sep. 30, 2021 USD ($) Program $ / shares shares	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) employee $ / shares shares	Sep. 30, 2021 USD ($) Program $ / shares shares	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) $ / shares shares	May 19, 2021 shares	Jul. 09, 2020 shares	Dec. 31, 2019 USD ($)
Liquidity
Number of clinical programs (in programs) | Program								2	2			2
Reverse stock split ratio			0.067
Common stock, par value (in dollars per share) | $ / shares			$ 0.01					$ 0.01	$ 0.01		$ 0.01	$ 0.01		$ 0.01
Common stock authorized (in shares) | shares			125,000,000					125,000,000	125,000,000		250,000,000	125,000,000		250,000,000	250,000,000
Net loss									$ (3,453,000)	$ (6,241,000)		$ (12,399,000)	$ (18,728,000)
Accumulated deficit								$ 440,955,000	440,955,000		$ 428,556,000	440,955,000		$ 428,556,000
Cash and cash equivalents								$ 59,378,000	$ 59,378,000	$ 24,198,000	$ 19,025,000	$ 59,378,000	24,198,000	$ 19,025,000			$ 22,726,000
Common stock outstanding (in shares) | shares								20,890,563	20,890,563		12,396,219	20,890,563		12,396,219		11,611,829
Net proceeds	$ 19,500,000			$ 26,700,000	$ 8,500,000		$ 1,840,000					$ 55,091,000	9,062,000
Warrants Exercised | shares												160,000
Proceeds from the exercise of warrants												$ 480,000	$ 10,016,000
Issuance of common stock, net (in shares) | shares	5,000,000			1,916,667	1,303,408	16,000	861
FTE positions eliminated | employee											10
FTE eliminated positions (as percent of workforce)											43.00%
Severance charge														$ 1,207,000
Non-cash charge, accelerated options														$ 29,000
Stock called by warrants or rights | shares							430
Piper Sandler & Co
Liquidity
Net proceeds								$ 0.5
Issuance of common stock, net (in shares) | shares								109,523
Weighted average price per of common share | $ / shares								$ 5.32	$ 5.32			$ 5.32
Piper Sandler & Co | At the Market Equity
Liquidity
Net proceeds								$ 500,000
Issuance of common stock, net (in shares) | shares								109,523
Weighted average price per of common share | $ / shares								$ 5.32	$ 5.32			$ 5.32
Piper Sandler & Co | At the Market Equity | Maximum
Liquidity
Net proceeds		$ 25,000,000.0

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Summary of Significant Accounting Policies - Segment Information (Details)	May 20, 2021
Summary of Significant Accounting Policies
Reverse stock split	one-for-fifteen

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Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Revenue	$ 57,000	$ 66,000	$ 170,000	$ 174,000
Deferred revenue
Balance at the beginning of the period			226,000
Balance at the end of the period	226,000		226,000
SymBio
Deferred revenue
Balance at the beginning of the period			3,695,000
Recognition to revenue			170,000
Balance at the end of the period	3,525,000		3,525,000
SymBio | License
Revenue
Revenue	$ 57,000	56,000	$ 170,000	169,000
SymBio | Supplies and other
Revenue
Revenue		$ 10,000		$ 5,000

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Net Loss Per Share of Common Stock (Details) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Potentially dilutive securities outstanding excluded from the computation of diluted weighted average shares as they would be antidilutive
Potentially dilutive securities outstanding excluded from the computation of diluted weighted average shares	934,592	833,024
Common Stock Warrants
Potentially dilutive securities outstanding excluded from the computation of diluted weighted average shares as they would be antidilutive
Potentially dilutive securities outstanding excluded from the computation of diluted weighted average shares	496,586	766,091
Stock options
Potentially dilutive securities outstanding excluded from the computation of diluted weighted average shares as they would be antidilutive
Potentially dilutive securities outstanding excluded from the computation of diluted weighted average shares	438,006	66,933

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Warrants (Details) - $ / shares	9 Months Ended
	Sep. 30, 2021	Jan. 05, 2016
Warrants
Number of securities to each class of warrant (in shares)		430
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	681,614
Warrants Exercised (in shares)	(160,000)
Warrants Expired (in shares)	(16,506)
Balance at end of the period (in shares)	505,108
Non-tradable warrants with exercise price 172.50 Liability
Warrants
Warrant exercise price (in dollars per share)	$ 2,587.50
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	430
Warrants Expired (in shares)	(430)
Tradable warrants with exercise price 73.80 Liability
Warrants
Warrant exercise price (in dollars per share)	$ 1,107.00
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	14,187
Warrants Expired (in shares)	(14,187)
Non-tradable pre-funded warrants with exercise price 0.15 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 2.25
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	26
Balance at end of the period (in shares)	26
Non-tradable warrants with exercise price 1.60 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 24.00
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	26,189
Balance at end of the period (in shares)	26,189
Non-tradable warrants with exercise price 14.10 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 211.50
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	333
Warrants Expired (in shares)	(333)
Non-tradable warrants with exercise price 21.15 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 317.25
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	556
Warrants Expired (in shares)	(556)
Non-tradable warrants with exercise price 7.7895 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 116.8425
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	1,000
Warrants Expired (in shares)	(1,000)
Non-tradable pre-funded warrants with exercise Price 0.15 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 2.25
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	3,522
Balance at end of the period (in shares)	3,522
Non-tradable warrants with exercise price 1.600 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 24.00
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	120,407
Balance at end of the period (in shares)	120,407
Non-tradable pre-funded warrants with exercise Price 0.15 Equity1
Warrants
Warrant exercise price (in dollars per share)	$ 2.25
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	4,974
Balance at end of the period (in shares)	4,974
Non-tradable warrants with exercise price 2.00 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 30.00
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	7,306
Balance at end of the period (in shares)	7,306
Non-tradable warrants with exercise price 0.20 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 3.00
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	409,500
Warrants Exercised (in shares)	(160,000)
Balance at end of the period (in shares)	249,500
Non-tradable warrants with exercise price 0.43625 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 6.54375
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	16,953
Balance at end of the period (in shares)	16,953
Non-tradable warrants with exercise price 0.45030 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 6.75450
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	46,263
Balance at end of the period (in shares)	46,263
Non-tradable Warrants with Exercise Price 0.45190 Equity
Warrants
Warrant exercise price (in dollars per share)	$ 6.77850
Warrants outstanding and warrant activity
Balance at beginning of the period (in shares)	29,968
Balance at end of the period (in shares)	29,968

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Balance Sheet Detail - Prepaid Expenses and Other Current Assets (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Prepaid expenses and other current assets:
Research and development	$ 22,000	$ 189,000
Manufacturing	158,000	90,000
Insurance	252,000	263,000
Other	97,000	180,000
Prepaid expenses and other current assets	$ 529,000	$ 722,000

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Balance Sheet Detail - Property and Equipment (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Property and Equipment
Property and equipment	$ 70,000	$ 70,000
Accumulated depreciation	(28,000)	(18,000)
Property and equipment, net	$ 42,000	$ 52,000

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Balance Sheet Detail - Accrued Expenses and Other Current Liabilities (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Balance Sheet Detail
Research and development	$ 1,750,000	$ 2,541,000
Employee compensation	888,000	2,239,000
Professional fees	111,000	182,000
Accrued expenses and other current liabilities	$ 2,749,000	$ 4,962,000

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Fair Value Measurements (Details) - USD ($)						9 Months Ended
	Sep. 28, 2021	Feb. 16, 2021	Jan. 11, 2021	Jul. 29, 2016	Jan. 05, 2016	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jul. 09, 2020
Sale of Securities
Aggregate shares issued	5,000,000	1,916,667	1,303,408	16,000	861
Price per share (in dollars per share)					$ 2,137.50				$ 21.60
Stock called by warrants or rights					430
Proceeds from Issuance of Common Stock	$ 19,500,000	$ 26,700,000	$ 8,500,000		$ 1,840,000	$ 55,091,000	$ 9,062,000
Estimated fair value using the Black-Scholes pricing model						$ 0		$ 0

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Fair Value Measurements - Rights Offering (Details) - $ / shares	Sep. 28, 2021	Feb. 16, 2021	Jan. 11, 2021	Jul. 29, 2016	Jan. 05, 2016
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net (in shares)	5,000,000	1,916,667	1,303,408	16,000	861
Tradable warrants liability
Subsidiary, Sale of Stock [Line Items]
Rights or warrants issued (in shares)				14,187
Shares into which each warrant can be converted (in shares)				1
Exercise price (in dollars per share)				$ 1,107
Class Of Warrant Or Right Initially Exercisable Term				five
Pre-funded warrants
Subsidiary, Sale of Stock [Line Items]
Rights or warrants issued (in shares)				2,918

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Fair Value Measurements - Fair Value Hierarchy Table (Details)	Dec. 31, 2020 USD ($)
Liabilities measured at fair value
Warrant liability	$ 321,000
Recurring basis
Liabilities measured at fair value
Total	321,000
Recurring basis | Tradable warrants liability
Liabilities measured at fair value
Warrant liability	321,000
Recurring basis | Level 1
Liabilities measured at fair value
Total	321,000
Recurring basis | Level 1 | Tradable warrants liability
Liabilities measured at fair value
Warrant liability	$ 321,000

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Stock-Based Compensation (Details) - USD ($) $ in Millions				9 Months Ended
	Feb. 17, 2021	Jul. 09, 2020	Jun. 17, 2019	Sep. 30, 2021	Dec. 31, 2020
Stock-Based Compensation
Market Capitalization	$ 600.0	$ 250.0
2018 Plan
Stock-Based Compensation
Shares authorized (in shares)				26,823
Additional shares authorized (in shares)			39,300
2021 Incentive Plan
Stock-Based Compensation
Shares authorized (in shares)				1,300,000
Stock options
Stock-Based Compensation
Additional shares authorized (in shares)				1,300,000
Common Stock available for future issuance (in shares)				917,094	12,339
Stock options | 2021 Incentive Plan
Stock-Based Compensation
Common Stock available for future issuance (in shares)				917,094

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Stock-Based Compensation - Expense (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stock-Based Compensation
Net tax benefits related to the stock-based compensation costs			$ 0
Compensation expense	$ 182,000	$ 90,000	315,000	$ 275,000
General and administrative
Stock-Based Compensation
Compensation expense	153,000	51,000	270,000	142,000
Research and development
Stock-Based Compensation
Compensation expense	$ 29,000	$ 39,000	$ 45,000	$ 133,000

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Stock-Based Compensation - Activity (Details) - Stock options - USD ($)	6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Shares Available for Grant
Balance at the beginning of the period (in shares)	12,339	12,339
Authorized		1,300,000
Granted (in shares)		(398,575)
Exercised (in shares)		4,642
Forfeitures (in shares)		3,330
Balance at the end of the period (in shares)		917,094	12,339
Number of Shares
Balance at the beginning of the period (in shares)	57,939	57,939
Granted (in shares)		398,575
Exercised (in shares)		(4,642)
Forfeitures (in shares)		(13,866)
Balance at the end of the period (in shares)		438,006	57,939
Vested or expected to vest at the end of the period (in shares)		420,868
Exercisable at the end of the period (in shares)		24,261
Weighted-Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 368.10	$ 368.10
Granted (in dollars per share)		5.29
Exercised (in dollars per share)		4.65
Forfeitures (in dollars per share)		940.63
Balance at the end of the period (in dollars per share)		21.55	$ 368.10
Vested or expected to vest at the end of the period (in dollars per share)		21.55
Exercisable at the end of the period (in dollars per share)		$ 297.34
Additional Disclosures
Weighted average remaining contractual term		9 years 7 months 24 days	8 years 4 months 17 days
Weighted average remaining contractual term of options granted		9 years 9 months 29 days
Weighted average remaining contractual term of options exercised		8 years 5 months 19 days
Weighted average remaining contractual term of options forfeitures		7 years 1 month 9 days
Weighted average remaining contractual term of options vested or expected to vest		9 years 7 months 24 days
Weighted average remaining contractual term of options exercisable		7 years 7 months 13 days
Aggregate intrinsic value of options exercised	$ 21,636

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Stock-Based Compensation - Unrecognized Compensation Expense (Details)	9 Months Ended
	Sep. 30, 2021 USD ($)
Stock options
Stock-Based Compensation
Unrecognized compensation expense related to unvested stock options	$ 1,897,000
Weighted-average period for recognizing unrecognized compensation expense related to unvested stock options (in years)	2 years 2 months 26 days
SAR awards
Stock-Based Compensation
Unrecognized compensation expense related to unvested stock options	$ 528,000
2020 SAR
Stock-Based Compensation
Unrecognized compensation expense related to unvested stock options	28,000
2021 SAR
Stock-Based Compensation
Unrecognized compensation expense related to unvested stock options	$ 350,000

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Stock-Based Compensation - Fair Value Assumptions (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Assumptions used
Expected term	6.5 years
Expected dividend yield (as a percent)	0.00%
SARs liability	$ 86,000
Stock options
Assumptions used
Risk-free interest rate (as a percent)	0.89%	0.44%
Expected volatility (as a percent)	133.83%	106.38%
Expected term (in years)	5 years 11 months 4 days	6 years
Expected dividend yield (as a percent)	0.00%	0.00%
Weighted average grant date fair value (in dollars per share)	$ 4.59	$ 3.75
Annualized forfeiture rate (as a percent)	4.14%		4.14%
2021 SAR
Assumptions used
Risk-free interest rate (as a percent)	0.95%
Expected volatility (as a percent)	129.79%
Expected dividend yield (as a percent)	0.00%
Weighted average grant date fair value (in dollars per share)	$ 0.62

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Stock-Based Compensation - Grants of PSUs and SARs (Details) - USD ($)			3 Months Ended		9 Months Ended
	Feb. 17, 2021	Jul. 09, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jan. 05, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)		$ 21.60						$ 2,137.50
Common stock outstanding (in shares)		11,611,829	20,890,563		20,890,563		12,396,219
Market capitalization	$ 600,000,000	$ 250,000,000
Compensation expense			$ 182,000	$ 90,000	$ 315,000	$ 275,000
SAR Award Agreement [member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)			$ 15.45		$ 15.45
Common stock outstanding (in shares)	15,767,492
SAR Award Agreement [member] | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)			38.10		38.10
SAR Award Agreement [member] | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)			$ 22.65		$ 22.65
2020 PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants		124,220
2021 PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock outstanding (in shares)	15,767,492
Market capitalization	$ 600,000,000
Shares issued			100,000		100,000
2021 PSU | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)	$ 38.10
2021 PSU | Initiation of a new clinical program with an in-licensed compound
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)	20.00%
2021 PSU | Reaching the recommended Phase 2 dose for any compound
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)	20.00%
2021 PSU | First patient enrolled in the expansion cohort of the Phase 1 ON123300 clinical trial
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)	20.00%
2021 PSU | First patient enrolled in a registrational study for any compound
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)	20.00%
2021 PSU | Topline data of a registrational study for any compound
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)	20.00%
SAR awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share base amount (per share)		$ 8.40
Share Based Compensation Arrangement By Share Based Payment Award for Cash Payment Of Each SAR		13.20
Compensation expense					$ 442,000
Unrecognized compensation expense related to unvested stock options			$ 528,000		528,000
SAR awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)		$ 21.60
2020 SAR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants		256,713
Share base amount (per share)		$ 8.40
Unrecognized compensation expense related to unvested stock options			$ 28,000		$ 28,000
2021 SAR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)	67.00%				33.00%
Share base amount (per share)	$ 22.65
Shares issued			100,000		100,000
Unrecognized compensation expense related to unvested stock options			$ 350,000		$ 350,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued			104,700		104,700
Issue price (in dollars per share)			$ 5.19		$ 5.19
Compensation expense					$ 513,000
Vesting Percentage One | 2020 PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)		50.00%
Vesting Percentage One | 2020 SAR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)		33.00%
Vesting Percentage One | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)					33.00%
Vesting Percentage Two | 2020 PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)		50.00%
Vesting Percentage Two | 2020 SAR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)		67.00%
Vesting Percentage Two | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (Percentage)					34.00%
Employee | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense					$ 30,000
Non employee directors | SAR awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards issued		8,333
Non employee directors | 2020 SAR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants		58,333

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Research Agreements (Details)	9 Months Ended
	Sep. 30, 2021 USD ($)
License
Research Agreements
Revenue	$ 0

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Related-Party Transactions (Details) - Mount Sinai - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related-Party Transactions
Payments to related party	$ 0	$ 0	$ 201,000
Amounts due to related party	$ 77,000	$ 77,000		$ 77,000

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Securities Registrations and Sales Agreements - January 2020 Offering (Details) - USD ($)						1 Months Ended		3 Months Ended	9 Months Ended
	Sep. 28, 2021	Feb. 16, 2021	Jan. 11, 2021	Jul. 29, 2016	Jan. 05, 2016	Jan. 31, 2020	Dec. 31, 2019	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net (in shares)	5,000,000	1,916,667	1,303,408	16,000	861
Payment of Non-accountable Expenses							$ 85,000
Payment of Clearing Fees							$ 10,000
Number of securities to each class of warrant (in shares)					430
Securities purchase agreements
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net (in shares)							1,844,168
Common Stock
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net (in shares)								5,109,523	8,329,598	1,844,168
Non-tradable warrants with exercise price 2.00 Equity
Subsidiary, Sale of Stock [Line Items]
Warrant exercise price (in dollars per share)								$ 30.00	$ 30.00
HCW
Subsidiary, Sale of Stock [Line Items]
Warrant exercise price (in dollars per share)							$ 6.7785
Percentage of management fees on gross proceeds							7.00%
Proceeds from issuance of warrants						$ 9,000,000.0
HCW | Maximum
Subsidiary, Sale of Stock [Line Items]
Number of securities to each class of warrant (in shares)							92,208
Certain institutional and accredited investors
Subsidiary, Sale of Stock [Line Items]
Percentage of management fees on gross proceeds							1.00%

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Securities Registrations and Sales Agreements - 2021 Offering (Details) - USD ($)										1 Months Ended		9 Months Ended
	Sep. 28, 2021	Sep. 23, 2021	Aug. 20, 2021	Feb. 16, 2021	Feb. 10, 2021	Jan. 11, 2021	Jan. 07, 2021	Jul. 29, 2016	Jan. 05, 2016	Sep. 30, 2021	Dec. 31, 2019	Sep. 30, 2021	Sep. 30, 2020	Jul. 09, 2020
Aggregate shares issued	5,000,000			1,916,667		1,303,408		16,000	861
Share Price									$ 2,137.50					$ 21.60
Net proceeds	$ 19,500,000			$ 26,700,000		$ 8,500,000			$ 1,840,000			$ 55,091,000	$ 9,062,000
Securities purchase agreements
Aggregate shares issued											1,844,168
Offer price (per share)											$ 5.4225
Lincoln Park Capital Fund, LLC | The Offering
Expense reimbursement												$ 100,000
Percentage rights to participate												50.00%
Threshold period for exercise or conversion of stock												one
Institutional Investors | The Offering
Aggregate shares issued							1,303,408
Purchase price							$ 6.675
Net proceeds												$ 8,500,000
Guggenheim Securities, LLC | The Offering
Aggregate shares issued		5,000,000
Share Price		$ 4.20
Underwriters option exercisable term		30 days
Net proceeds		$ 19,500,000
Cash fee		6.00%
Legal fees and expenses		$ 100,000
Guggenheim Securities, LLC | Over-allotment
Aggregate shares issued					1,666,667
Purchase price					$ 15.00
Threshold period for exercise or conversion of stock					30
Net proceeds					$ 26,700,000
Additional shares agreed to issue					250,000
Cash fee					6.00%
Legal fees and expenses					$ 100,000
Piper Sandler & Co
Aggregate shares issued										109,523
Net proceeds										$ 0.5
Weighted average price per of common share										$ 5.32		$ 5.32
Piper Sandler & Co | At the Market Equity
Aggregate shares issued										109,523
Net proceeds										$ 500,000
Percentage of gross proceeds of shares of common stock sold			3.00%
Weighted average price per of common share										$ 5.32		$ 5.32
Maximum | SAR awards
Share Price														$ 21.60
Maximum | Guggenheim Securities, LLC | Over-allotment
Aggregate shares issued		750,000
Maximum | Piper Sandler & Co | At the Market Equity
Net proceeds			$ 25,000,000.0