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, 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
Net income					18,124
Balances at Jun. 30, 2021	$ 667	30,657	284,501	(55,212)	260,613
Balances (in shares) at Jun. 30, 2021	5,658,481
Balances at Mar. 31, 2021	$ 667	30,003	274,312	(55,212)	249,770
Balances (in shares) at Mar. 31, 2021	5,653,336
Increase (Decrease) in Stockholders' Equity
Stock options exercised		83			83
Stock options exercised (in shares)	2,000
Stock-based compensation		571			571
Stock-based compensation (in shares)	3,145
Cash dividends paid			(904)		(904)
Net income			11,093		11,093
Balances at Jun. 30, 2021	$ 667	30,657	284,501	(55,212)	260,613
Balances (in shares) at Jun. 30, 2021	5,658,481
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, 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
Net income					18,906
Balances at Jun. 30, 2022	$ 669	33,185	318,250	(55,934)	296,170
Balances (in shares) at Jun. 30, 2022	5,673,610
Balances at Mar. 31, 2022	$ 669	32,425	309,146	(55,934)	286,306
Balances (in shares) at Mar. 31, 2022	5,668,123
Increase (Decrease) in Stockholders' Equity
Stock options exercised		120			120
Stock options exercised (in shares)	2,400
Stock-based compensation		640			640
Stock-based compensation (in shares)	3,087
Cash dividends paid			(1,134)		(1,134)
Net income			10,238		10,238
Balances at Jun. 30, 2022	$ 669	$ 33,185	$ 318,250	$ (55,934)	$ 296,170
Balances (in shares) at Jun. 30, 2022	5,673,610