Accrued Expenses and Long-term Liabilities - Schedule of Other Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued royalties	$ 2,984	$ 2,710
Contingent consideration	437	398
Upfront Medicare payment	2,066	2,066
Operating lease liability	894	1,027
Financing lease liability	150	177
Deferred revenue	52	54
Accrued sales and marketing - diagnostics	75	51
Accrued lab costs - diagnostics	160	161
Accrued professional fees	538	854
Taxes payable	331	334
Unclaimed property	565	565
All others	1,170	1,398
Total other accrued expenses	$ 9,422	$ 9,795