Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other liabilities, current
Accrued compensation	$ 3,121	$ 2,641
Salary continuation payments	617	935
Restricted stock units	687	714
Deferred payroll tax liability	471	471
Excise tax liability	681	268
Accrued directors' fees	15	15
Total	5,592	5,044
Other liabilities, non-current
Finance lease liability	260	286
Operating lease liability	41	53
Total	$ 301	$ 339
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total	Total
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total	Total