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Warrants | 3 Months Ended
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Mar. 31, 2021
Warrants and Rights Note Disclosure [Abstract] |
Warrants | WARRANTS The Company issues common stock warrants in connection with debt or equity financings to lenders, placement agents and investors. Issued warrants are considered standalone financial instruments and the terms of each warrant are analyzed for equity or liability classification in accordance with U.S. GAAP. Warrants that are classified as liabilities usually have various features that would require net-cash settlement by the Company. Warrants that are not liabilities, derivatives and/or meet the exception criteria are classified as equity. Warrants liabilities are remeasured at fair value at each period end with changes in fair value recorded in the condensed consolidated statements of operations until expired or exercised. Warrants that are classified as equity are valued at their relative fair value on the date of issuance, recorded in additional paid in capital and not remeasured. In the three months ended March 31, 2021, there were no warrants exercised to purchase shares of common stock for cash proceeds. In the three months ended March 31, 2020, warrants to purchase approximately 272,000 shares of common stock were exercised for cash payments of $0.3 million. During the three months ended March 31, 2020, a warrant to purchase approximately 34,000 shares of common stock was exercised on a cashless basis and approximately 24,000 shares were issued pursuant to the exercise. As of March 31, 2021, outstanding warrants to purchase common stock were:
| Classified as |  | Original Term |  | Exercise Price |  | Number of Shares Underlying Warrants
Original issue date: |  |  |  |  |  |  |
April 2016 | Liability |  | 7 years |  | $ | 1.12 |  |  | 6,264 |
|  |  |  |  |  |  | 6,264 |

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