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Stockholders' Equity | 12 Months Ended
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Dec. 31, 2021
Stockholders' Equity Note [Abstract] |
Stockholders' Equity | Stockholders’ Equity Warrants A summary of warrant activity and changes in warrants outstanding, including both liability and equity classifications, is presented below:
| Number of Warrants |  | Weighted-Average Exercise Price Per Share |  | Weighted-Average Remaining Contractual Term
Balance outstanding, December 31, 2019 | 10,589,482 |  |  | $ | 4.08 |  |  | 3.7 years
Granted | 5,831,451 |  |  | $ | 1.70 |  |  |
Exercised | (11,159,941) |  |  | $ | 2.31 |  |  |
Balance outstanding, December 31, 2020 | 5,260,992 |  |  | $ | 5.19 |  |  | 4.1 years
Exercised | (770,833) |  |  | $ | 1.64 |  |  |
Balance outstanding, December 31, 2021 | 4,490,159 |  |  | $ | 5.80 |  |  | 3.0 years
The above table excludes pre-funded warrants with a nominal exercise price of $.01 per share: 1.605,072 pre-funded warrants outstanding as of December 31, 2019; 2.386,967 pre-funded warrants which were issued during the twelve months ending December 31, 2020; 3.All 992,039 pre-funded warrants were exercised in full during the twelve months ending December 31, 2020. Preferred Stock A summary of our Company's classes of preferred stock is presented below:
|  |  |  |  |  |  |  | Shares outstanding
Class |  | Par value |  | Shares designated |  | Liquidation preference |  | As of December 31, 2021 |  | As of December 31, 2020
Series A Convertible Preferred Stock |  | $ | 0.001 |  |  | 277,100 |  |  | $ | 606,000 |  |  | 60,600 |  |  | 60,600 |
Series B Convertible Preferred Stock |  | $ | 0.001 |  |  | 8,860 |  |  | None |  | — |  |  | — |
Series C Convertible Preferred Stock |  | $ | 0.001 |  |  | 200,000 |  |  | None |  | — |  |  | — |
Series D Convertible Preferred Stock |  | $ | 0.0001 |  |  | 154,670 |  |  | None |  | — |  |  | — |
Series E Convertible Preferred Stock |  | $ | 0.001 |  |  | 865,824 |  |  | None |  | 655,044 |  |  | 655,044 |
Series A Convertible Preferred Stock The material terms of the Series A Convertible Preferred Stock consist of: 1)Dividends. Holders of the Company’s Series A Convertible Preferred Stock are entitled to receive cumulative dividends at the rate per share of 4% per annum, payable quarterly on March 31, June 30, September 30 and December 31, beginning with September 30, 2005. Dividends are payable, at the Company’s sole election, in cash or shares of common stock. As of December 31, 2021 and 2020, the Company had $414,000 and $390,000, respectively in accrued cumulative unpaid preferred stock dividends, included in accrued liabilities in the Company’s balance sheets, and $24,000 and $24,000 of accrued dividends were recorded during the years ended December 31, 2021 and 2020, respectively. 2)Voting Rights. Shares of the Series A Convertible Preferred Stock have no voting rights. However, so long as any shares of Series A Convertible Preferred Stock are outstanding, the Company may not, without the affirmative vote of the holders of the shares of Series A Convertible Preferred Stock then outstanding, (a) adversely change the powers, preferences or rights given to the Series A Convertible Preferred Stock, (b) authorize or create any class of stock senior or equal to the Series A Convertible Preferred Stock, (c) amend its certificate of incorporation or other charter documents, so as to affect adversely any rights of the holders of Series A Convertible Preferred Stock or (d) increase the authorized number of shares of Series A Convertible Preferred Stock. 3)Liquidation. Upon any liquidation, dissolution or winding-up of the Company, the holders of the Series A Convertible Preferred Stock are entitled to receive an amount equal to the Stated Value per share, which is currently $10 per share plus any accrued and unpaid dividends. 4)Conversion Rights. Each share of Series A Convertible Preferred Stock is convertible at the option of the holder into that number of shares of common stock determined by dividing the Stated Value, currently $10 per share, by the conversion price, which at the time of issuance was $928.80 per share, and subsequently adjusted to $691.20 per share. 5)Subsequent Equity Sales. The conversion price is subject to adjustment for dilutive issuances for a period of 12 months beginning March 17, 2006 and the conversion price was adjusted to $691.20 per share. 6) Automatic Conversion. If the price of the Company’s common stock equals $1,857.60 per share for 20 consecutive trading days, and an average of 116 shares of common stock per day are traded during the 20 trading days, the Company will have the right to deliver a notice to the holders of the Series A Convertible Preferred Stock, requesting the holders to convert any portion of the shares of Series A Convertible Preferred Stock into shares of common stock at the applicable conversion price. As of the date of these financial statements, such conditions have not been met. Series D Convertible Preferred Stock and Service Receivable On May 8, 2020, the Company entered into a Stock and Warrant Subscription Agreement with PoC, whereby PoC agreed to finance an additional $2.3 million for a clinical trial in exchange for (i) 602,833 shares of its common stock (the “Common Stock”), (ii) 154,670 shares of its Series D Preferred Stock and (iii) a warrant exercisable for 859,813 shares of its Common Stock. In exchange, PoC is funding our clinical development of onvansertib in metastatic colorectal cancer pursuant to a Master Services Agreement dated as of January 25, 2019, as amended. The warrant will be exercisable six months following the date of issuance at an exercise price of $1.50 per share and will expire on November 7, 2025. In June of 2020, all 154,670 Series D Preferred Stock were converted to 1,546,700 shares of Common Stock. The Company evaluated the awards issued under this transaction and determined they should be classified as equity. These equity awards were fully vested and non-forfeitable. Since the equity awards were for clinical trial services yet to be provided, the Company recognized $2.3 million service receivables as contra equity. The Company releases the service receivables as clinical trial services are performed. The conversion feature of the Series D Convertible Preferred Stock at the time of issuance was determined to be beneficial on the commitment date. Because the Series D Convertible Preferred Stock was perpetual with no stated maturity date, and the conversions could occur any time from inception, the Company immediately recorded a non-cash deemed dividend of $0.6 million related to the beneficial conversion feature arising from the issuance of Series D Convertible Preferred Stock. This non-cash deemed dividend increased the Company’s net loss attributable to common stockholders and net loss per share for the year-ending December 31, 2020. Series E Convertible Preferred Stock On June 15, 2020 the Company entered into a Securities Purchase Agreement with Acorn Bioventures LP ("Acorn"), CDK Associates, L.L.C. (“CDK”) and Third Street Holdings LLC (“Third Street”), pursuant to which the Company agreed to offer, issue and sell to Acorn, CDK and Third Street, (i) in a registered direct offering, an aggregate of 1,984,328 shares of common stock and (ii) in a concurrent private placement, (a) an aggregate of 865,824 shares of Series E Preferred Stock (“Series E Preferred Stock”) and (b) Series N warrants to purchase up to 2,213,115 shares of Common Stock. The Series E Preferred Stock is convertible at any time determined by dividing the $10 stated value per share of the Series E Preferred Stock by a conversion price of $2.44 per share, subject to adjustment in accordance with the Certificate of Designation. The Series N Warrants will be exercisable six months following the date of issuance at an exercise price of $2.39 per share and will expire on December 16, 2025. Certain investors converted 210,780 shares of Series E Convertible Preferred stock to 863,852 shares of Common Stock during December 2020. The conversion feature of the Series E Convertible Preferred Stock at the time of issuance was determined to be beneficial on the commitment date. Because the Series E Convertible Preferred Stock was perpetual with no stated maturity date, and the conversions could occur any time from inception, the Company immediately recorded a non-cash deemed dividend of $2.7 million related to the beneficial conversion feature arising from the issuance of Series E Convertible Preferred Stock. This non-cash deemed dividend increased the Company’s net loss attributable to common stockholders and net loss per share for the year-ending December 31, 2020. In conjunction with the June 15, 2020 offering, we issued 184,426 warrants as an advisory fee. These warrants are exercisable six months following the date of issuance at an exercise price of $3.05 per share and will expire 5.5 years following the date of issuance. These warrants are classified as equity and its estimated fair value of $370,666 was recognized as additional paid in capital on the issuance date. The estimated fair value is determined using the Black-Scholes Option Pricing Model which is based on the value of the underlying common stock at the valuation measurement date, the remaining contractual term of the warrant, risk-free interest rates, expected dividends and expected volatility of the price of the underlying common stock. Securities Purchase Agreements with Lincoln Park Capital Fund, LLC On March 30, 2020, the Company entered into a Securities Purchase Agreement with Lincoln Park Capital Fund, LLC ("LPC") which the company sold a combination of common stock and warrants for gross proceeds of $1.0 million. Under this agreement 800,000 shares of common stock, 131,967 pre-funded warrants and 931,967 Series J Warrants were sold. On April 9, 2020, the Company entered into a Securities Purchase Agreement with LPC, which the company sold a combination of common stock and warrants for gross proceeds of $1.1 million. Under this agreement 904,970 shares of common stock, 255,000 pre-funded warrants and 1,159,970 Series L Warrants were sold. Securities Purchase Agreement with Certain Directors and Executives On May 11, 2020 and May 14, 2020, the Company entered into Securities Purchase Agreements with certain directors and executives of the Company pursuant to which the Company sold 447,761 shares of common stock at a purchase price of $1.34 per share and 146,854 shares of common stock at a purchase price of $1.43 per share. The gross proceeds from these purchases were $810,000. Securities Purchase Agreement with Acorn Bioventures LP On May 26, 2020, the Company entered into a Securities Purchase Agreement with Acorn which the Company sold a combination of common stock and warrants for gross proceeds of $2.5 million. Under the agreement the Company sold 1,205,400 shares of common stock and 482,160 Series M Warrants. Underwritten Public Offering On October 2, 2020 the Company completed an underwritten public offering of 6,500,000 shares of its common stock at a price to the public of $13.50 per share. In addition, the underwriters exercised in full an option to purchase an additional 975,000 shares of common stock at the public offering price, less the underwriting discounts and commissions. All of the shares in the offering were sold by the Company, with gross proceeds of approximately $100.9 million, and net proceeds of approximately $94.0 million, after deducting underwriting discounts, commissions and estimated offering expenses. Sales Agreement with Jefferies LLC During May 2021, the Company sold 2.0 million shares of its common stock under the Sales Agreement with Jefferies LLC., for gross proceeds of approximately $20.0 million. Pfizer Breakthrough Growth Initiative During November 2021, the Company sold 2.4 million shares of its common stock under a Securities Purchase Agreement with Pfizer Inc. ("Pfizer"), in a registered direct offering for gross proceeds of approximately $15.0 million. The investment is part of the Pfizer Breakthrough Growth Initiative, which includes an information rights agreement and Pfizer's participation on a Scientific Advisory Board for the Company. Pfizer has agreed to not sell or transfer any shares for 180 days from the closing date of the agreement.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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