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Net Loss Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Common Stock Equivalents Excluded from Computation of Diluted Loss per Share |
|  | Nine months ended September 30, |
|  | 2021 |  |  | 2020 |
Outstanding stock options |  |  | 5,131,263 |  |  |  | 3,693,943 |
Nonvested restricted stock and unit awards |  |  | 1,153,364 |  |  |  | 1,230,651 |
Stock purchase warrants |  |  | 216,944 |  |  |  | 715,199 |
|  |  | 6,501,571 |  |  |  | 5,639,793 |
Schedule of stock purchase warrants outstanding |
Number of Warrants |  | Exercise Price | Expiration Date
22,253 | $ | 5.68 | 3/30/2022
17,066 | $ | 12.60 | 6/30/2022
151,364 | $ | 12.60 | 8/18/2022
14,286 | $ | 12.60 | 8/31/2022
11,975 | $ | 15.30 | 12/22/2025
216,944 |  |  |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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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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