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Note 4 - Fair Value Measurements - Fair Value of Warrant Liability (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Warrant Liability [Member] |  |
Fair value | $ 9,558 | $ 0
Fair value | 0 | 9,558
Warrant Liability [Member] | The November 2021 Warrants [Member] |  |
Decrease in fair value | (2,056) | (4,614)
Reclassification of Warrants | (7,502) |
Fair value of warrants issued in connection with the 2022 Warrant Reprice Transaction (see Note 14) |  | 14,172
Warrant Liability [Member] | The 2022 Warrant Reprice Transaction [Member] |  |
Decrease in fair value | (3,390) |
Fair value of warrants issued in connection with the 2022 Warrant Reprice Transaction (see Note 14) | 5,241 |
Warrant Liability [Member] | The September 2022 Warrants [Member] |  |
Reclassification of Warrants | (1,851) |
Contingent Earnout Liability [Member] |  |
Fair value | 561 |
Decrease in fair value | (561) |
Fair value | $ 0 | $ 561

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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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 https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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