Income Taxes - Net Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Stock-based compensation	$ 1,274	$ 2,440
Federal, state and local net operating loss carryforwards	6,684	2,907
Accrued compensation and other accrued expenses	728	664
Allowance for doubtful accounts	309	329
Basis difference arising from discounted note payable	11	11
Foreign tax credit	219	219
Charitable contribution carryover	77	63
Property and equipment	488	321
Interest expense	602	0
Total deferred tax assets	10,392	6,954
Deferred tax liabilities
Basis difference arising from intangible assets of acquisition	(10,251)	(10,006)
Total deferred tax liabilities	(10,251)	(10,006)
Net deferred tax assets (liabilities)	$ 141
Net deferred tax assets (liabilities)		$ (3,052)