CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Total
Balances at Dec. 31, 2020	$ 666	$ 29,457	$ 268,186	$ (55,117)	$ 243,192
Balances (in shares) at Dec. 31, 2020	5,648,084
Increase (Decrease) in Stockholders' Equity
Stock options exercised (in shares)	3,310
Stock-based compensation	$ 1	546			547
Stock-based compensation (in shares)	2,685
Treasury shares purchased				(95)	(95)
Treasury shares purchased (in shares)	(743)
Cash dividends paid			(905)		(905)
Net income			7,031		7,031
Balances at Mar. 31, 2021	$ 667	30,003	274,312	(55,212)	249,770
Balances (in shares) at Mar. 31, 2021	5,653,336
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