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Note 6 - Warrant Liabilities - Schedule of Warrant Liabilities (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
As of December 31, 2021 $ 8,335 $ 143,237
Warrants issued 0 37,037
Fair Value Adjustment of Warrants (6,390) (47,000)
Write-off of deferred costs   203
Settlements   (337)
Reclassification to equity   (124,805)
As of December 31, 2022 1,945 8,335
Liberty Warrants and Liberty Advisory Fee Warrant [Member]    
As of December 31, 2021 6,191 0
Warrants issued 0 30,853
Fair Value Adjustment of Warrants (5,009) (24,662)
Write-off of deferred costs   0
Settlements   0
Reclassification to equity   0
As of December 31, 2022 1,182 6,191
Pipe Warrant [Member]    
As of December 31, 2021 311 0
Warrants issued 0 1,312
Fair Value Adjustment of Warrants (252) (1,001)
Write-off of deferred costs   0
Settlements   0
Reclassification to equity   0
As of December 31, 2022 59 311
Columbia Warrant [Member]    
As of December 31, 2021 0 143,237
Warrants issued   0
Fair Value Adjustment of Warrants   (18,635)
Write-off of deferred costs   203
Settlements   0
Reclassification to equity   (124,805)
As of December 31, 2022   0
The 8.63 Warrants [Member]    
As of December 31, 2021 1,833 0
Warrants issued 0 4,872
Fair Value Adjustment of Warrants (1,129) (2,702)
Write-off of deferred costs   0
Settlements   (337)
Reclassification to equity   0
As of December 31, 2022 $ 704 $ 1,833