Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued compensation	$ 7,785	$ 7,669
Contingent consideration	225	225
Accrued professional fees	647	825
Accrued income tax	1,286	281
Current portion of finance lease liability	48	48
Accrued interest	19	42
Accrued royalties	312	456
Accrued liabilities - other	504	1,227
Accrued and other current liabilities	$ 10,826	$ 10,773