Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Other liabilities, current:
Accrued compensation	$ 2,399	$ 2,868
Excise tax liability	0	96
Accrued directors fees	39	36
Operating lease liability	0	11
Total	2,438	3,011
Other liabilities, non-current
Operating lease liability	$ 17	$ 0