Unaudited Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Preferred Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2020	$ 0	$ 33	$ 302,598		$ (97,385)	$ 205,246
Balance (in shares) at Dec. 31, 2020	0	33,039,146
Stock-based compensation			1,505			1,505
Stock option exercises (in shares)		162,865
Stock option exercises	$ 0	$ 0	243	$ 0	0	243
Stock issued – on vested RSAs (in shares)	0	362,153
Stock issued – on vested RSAs	$ 0	$ 0	0	0	0	0
Net loss	0	0	0	0	(1,118)	(1,118)
Cashless exercises of warrants	0	$ 1	2,900	0	0	2,901
Cashless exercises of warrants (in shares)		70,030
Balance (in shares) at Mar. 31, 2021		33,634,194
Balance at Mar. 31, 2021		$ 34	307,246	0	(98,503)	208,777
Balance at Dec. 31, 2021	$ 0	$ 42	585,397	(282)	(105,020)	480,137
Balance (in shares) at Dec. 31, 2021		41,817,503
Stock-based compensation			5,399			5,399
Stock option exercises (in shares)		129,933
Stock option exercises			257	0	0	257
Stock issued – on vested RSAs (in shares)	0	383,646
Stock issued – on vested RSAs	$ 0	$ 0	0	0	0	0
Fees incurred for registration filings			(51)			(51)
Foreign currency translation				(156)		(156)
Net loss	$ 0	$ 0	0	0	(7,066)	(7,066)
Balance (in shares) at Mar. 31, 2022		42,331,082
Balance at Mar. 31, 2022		$ 42	$ 591,002	$ (438)	$ (112,086)	$ 478,520