CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Total
Balances at Dec. 31, 2021	$ 669	$ 31,774	$ 301,611	$ (55,848)	$ 278,206
Balances (in shares) at Dec. 31, 2021	5,666,012
Increase (Decrease) in Stockholders' Equity
Stock-based compensation		651			651
Stock-based compensation (in shares)	2,823
Treasury shares purchased				(86)	(86)
Treasury shares purchased (in shares)	(712)
Cash dividends paid			(1,133)		(1,133)
Net income			8,668		8,668
Balances at Mar. 31, 2022	$ 669	32,425	309,146	(55,934)	286,306
Balances (in shares) at Mar. 31, 2022	5,668,123
Balances at Dec. 31, 2022	$ 671	34,528	342,504	(56,615)	321,088
Balances (in shares) at Dec. 31, 2022	5,682,079
Increase (Decrease) in Stockholders' Equity
Stock options exercised	$ 1	112			113
Stock options exercised (in shares)	5,762
Stock-based compensation		812			812
Stock-based compensation (in shares)	3,124
Treasury shares purchased				(98)	(98)
Treasury shares purchased (in shares)	(646)
Cash dividends paid			(1,137)		(1,137)
Net income			17,104		17,104
Balances at Mar. 31, 2023	$ 672	$ 35,452	$ 358,471	$ (56,713)	$ 337,882
Balances (in shares) at Mar. 31, 2023	5,690,319