Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020	91,968,000
Balance at Dec. 31, 2020	$ 9	$ 581,426	$ (107,209)	$ 474,226
Exercise of warrants (in shares)	554,000
Exercise of warrants	$ 0	5,466	0	5,466
Shares issued upon options being exercised (in shares)	154,000
Shares issued upon options being exercised	$ 0	1,574	0	1,574
Compensation costs included in net income	0	966	0	966
Net income (loss)	$ 0	0	4,744	4,744
Balance (in shares) at Mar. 31, 2021	92,676,000
Balance at Mar. 31, 2021	$ 9	589,432	(102,465)	486,976
Balance (in shares) at Dec. 31, 2020	91,968,000
Balance at Dec. 31, 2020	$ 9	581,426	(107,209)	$ 474,226
Shares issued upon options being exercised (in shares)				154,268
Balance (in shares) at Dec. 31, 2021	96,774,000
Balance at Dec. 31, 2021	$ 10	617,489	(64,436)	$ 553,063
Dividends declared	0	0	(2,434)	(2,434)
Dividend equivalents declared on outstanding stock options	$ 0	0	(250)	(250)
Stock issued for acquisition (in shares)	6,960,000
Stock issued for acquisition	$ 0	156,599	0	156,599
Stock issuance costs	$ 0	(55)	0	(55)
Exercise of warrants (in shares)	69,000
Exercise of warrants	$ 0	779	0	$ 779
Shares issued upon options being exercised (in shares)	8,000			7,500
Shares issued upon options being exercised	$ 0	75	0	$ 75
Compensation costs included in net income	0	2,614	0	2,614
Net income (loss)	$ 0	0	(16,510)	(16,510)
Balance (in shares) at Mar. 31, 2022	103,811,000
Balance at Mar. 31, 2022	$ 10	$ 777,501	$ (83,630)	$ 693,881