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Derivative Instruments (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Jul. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |  |  |  |  |
Issuance of derivative instrument |  |  |  |  |  |  | $ 700
Loss on derivative instruments |  |  | $ 15 |  | $ 29 | $ (29) |
Clene Nanomedicine contingent earn-out | $ 64,700 |  |  | $ 34,000 |  | 52,100 |
Initial shareholders contingent earn-out | $ 7,400 | $ 4,200 |  | 4,200 |  | $ 5,900 |
Gain (loss) on Clene Nanomedicine contingent earn-out |  | 35,000 |  | (18,100) |  |  |
Gain (loss) on Initial Shareholders contingent earn-out |  | 3,400 |  | (1,700) |  |  |
Warrant fair value |  |  |  | 1,500 |  |  |
Change in fair value warrants |  | $ 400 |  | $ 500 |  |  |

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- Definition Fair value of contingent consideration in a business combination that is classified in shareholders' equity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 + Details
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- Definition Amount of addition (reduction) to the amount at which an instrument classified in shareholders' equity could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
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