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Common Stock Warrants (Tables) | 3 Months Ended
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Mar. 31, 2022
Equity [Abstract] |
Schedule of Warrants | The following table provides a roll forward of outstanding warrants for the three month period ended March 31, 2022:
|  | Number of warrants |  | Weighted Average Exercise Price |  | Weighted Average Contractual Term (Years)
Outstanding and exercisable warrants to purchase common shares as of December 31, 2021 |  | 13,257,160 |  |  | $7.96 |  | 2.72
Issued |  | 766,666 |  |  | $1.80 |  |
Exercised |  | (100) |  |  |  |  |
Outstanding and exercisable warrants to purchase common shares as of March 31, 2022 |  | 14,023,726 |  |  | $6.91 |  | 2.47
As of March 31, 2022, the Company’s outstanding warrants to purchase shares of common stock consisted of the following:
Issuance Date |  | Number of Shares of Common Stock Issuable |  | Exercise Price |  | Expiration Date
October 25, 2016 |  | 5,155 |  |  | $ | 19.78 |  |  | October 24, 2026
December 28, 2017 |  | 115,916 |  |  | $ | 19.78 |  |  | December 28, 2027
September 12, 2018 |  | 20,220 |  |  | $ | 19.78 |  |  | September 12, 2028
October 19, 2018 |  | 20,016 |  |  | $ | 19.78 |  |  | October 19, 2028
March 13, 2019 |  | 5,000 |  |  | $ | 19.78 |  |  | March 12, 2029
April 16, 2019 |  | 3,866,154 |  |  | $ | 13.20 |  |  | April 15, 2024
November 29, 2019 |  | 5,416,567 |  |  | $ | 1.80 |  |  | November 28, 2024
November 29, 2019 |  | 1,750,000 |  |  | $ | 12.00 |  | (a) | n/a
March 23, 2021 |  | 50,000 |  |  | $ | 8.70 |  | (b) | n/a
November 9, 2021 |  | 2,008,032 |  |  | $ | 4.98 |  | (c) | n/a
March 3, 2022 |  | 766,666 |  |  | $ | 1.80 |  | (d) | n/a
|  | 14,023,726 |  |  |  |  |
(a) In November 2019, the Company received $11.999 per pre-funded warrant, or $21.0 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.001 per pre-funded warrant. (b) In March 2021, the Company received $8.69 per pre-funded warrant, or $435 thousand in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.01 per pre-funded warrant. (c) In November 2021, the Company received $4.97 per pre-funded warrant, or $10.0 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.01 per pre-funded warrant. (d) In March 2022, the Company received $1.79 per pre-funded warrant, or $3.0 million in aggregate proceeds. Each pre-funded warrant may be exercised for an additional $0.01 per pre-funded warrant.

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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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