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Derivative Liability (Tables) | 3 Months Ended
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Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Changes in Fair Value of Derivative Liability | Changes in the fair value of our exit fee derivative liabilities recurring measurements included in Level 3 of the fair value hierarchy are presented as other income, net in our statements of operations and were as follows for the three months ended March 31, 2022 and 2021 (in thousands):
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Beginning balance | $ | 698 |  |  | $ | 1,376 |  |  |  |  |
2022 Exit Fee addition at fair value | 375 |  |  | — |  |  |  |  |
Changes in estimated fair value | 15 |  |  | 36 |  |  |  |  |
Ending balance | $ | 1,088 |  |  | $ | 1,412 |  |  |  |  |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 + Details
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