CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock	Total
Balances at Dec. 31, 2019	$ 663	$ 27,464	$ (1)	$ 243,566	$ (54,560)	$ 217,132
Balances (in shares) at Dec. 31, 2019	5,622,826
Increase (Decrease) in Stockholders' Equity
Stock options exercised		81				81
Stock options exercised (in shares)	2,000
Stock-based compensation	$ 1	378				379
Stock-based compensation (in shares)	3,063
Treasury shares purchased					(64)	(64)
Treasury shares purchased (in shares)	(704)
Cash dividends paid				(899)		(899)
Net income				5,544		5,544
Mark to market of foreign exchange hedges, net of tax benefit of $2 and $0 for the three and six months ended June 30, 2020, respectively			(6)			(6)
Comprehensive income			(6)	5,544		5,538
Balances at Mar. 31, 2020	$ 664	27,923	(7)	248,211	(54,624)	222,167
Balances (in shares) at Mar. 31, 2020	5,627,185
Balances at Dec. 31, 2019	$ 663	27,464	(1)	243,566	(54,560)	217,132
Balances (in shares) at Dec. 31, 2019	5,622,826
Increase (Decrease) in Stockholders' Equity
Net income						11,645
Mark to market of foreign exchange hedges, net of tax benefit of $2 and $0 for the three and six months ended June 30, 2020, respectively						1
Comprehensive income						11,646
Balances at Jun. 30, 2020	$ 664	28,386		253,411	(54,842)	227,619
Balances (in shares) at Jun. 30, 2020	5,627,869
Balances at Mar. 31, 2020	$ 664	27,923	(7)	248,211	(54,624)	222,167
Balances (in shares) at Mar. 31, 2020	5,627,185
Increase (Decrease) in Stockholders' Equity
Stock-based compensation		463				463
Stock-based compensation (in shares)	3,143
Treasury shares purchased					(218)	(218)
Treasury shares purchased (in shares)	(2,459)
Cash dividends paid				(901)		(901)
Net income				6,101		6,101
Mark to market of foreign exchange hedges, net of tax benefit of $2 and $0 for the three and six months ended June 30, 2020, respectively			7			7
Comprehensive income			$ 7	6,101		6,108
Balances at Jun. 30, 2020	$ 664	28,386		253,411	(54,842)	227,619
Balances (in shares) at Jun. 30, 2020	5,627,869
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
Comprehensive 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
Mark to market of foreign exchange hedges, net of tax benefit of $2 and $0 for the three and six months ended June 30, 2020, respectively						0
Comprehensive 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
Mark to market of foreign exchange hedges, net of tax benefit of $2 and $0 for the three and six months ended June 30, 2020, respectively						0
Comprehensive 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