Annual report pursuant to Section 13 and 15(d)

Warrant Liabilities (Details 2)

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Warrant Liabilities (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Warrant Liabilities [Abstract]    
Balance at beginning of period $ 1,619 $ 8,147
Reclassification of warrant liability upon forfeiture (232) (203)
Change in fair value of warrant liabilities 2,152 (6,342)
Amortization of warrant issuance costs 18 17
Balance at end of period $ 3,557 $ 1,619