Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other liabilities, current
Accrued compensation	$ 2,641	$ 1,560
Salary continuation payments	935	1,215
Restricted stock units	714	913
Deferred payroll tax liability	471	436
Excise tax liability	268	0
Accrued directors' fees	15	33
Total	5,044	4,157
Other liabilities, non-current
Finance lease liability	286	0
Operating lease liability	53	0
Salary continuation payments	0	1,145
Deferred payroll tax liability	0	505
Total	$ 339	$ 1,650
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total	Total
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total	Total