CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings	Treasury Stock	Total
Balances at Dec. 31, 2017	$ 659	$ 24,307	$ 86	$ 233,905	$ (53,705)	$ 205,252
Balances (in shares) at Dec. 31, 2017	5,588,821
Increase (Decrease) in Stockholders' Equity
Stock options exercised		73				73
Stock options exercised (in shares)	2,000
Stock-based compensation		316				316
Stock-based compensation (in shares)	2,733
Treasury shares purchased					(61)	(61)
Treasury shares purchased (in shares)	(861)
Cash dividends paid				(755)		(755)
Net income				4,262		4,262
Mark to market of foreign exchange hedges, net of $6 tax benefit and $10 tax benefit 2019 and 2018, respectively			(34)			(34)
Comprehensive income			(34)	4,262		4,228
Balances at Mar. 31, 2018	$ 659	24,696	52	237,412	(53,766)	209,053
Balances (in shares) at Mar. 31, 2018	5,592,693
Balances at Dec. 31, 2018	$ 661	25,867	(13)	250,568	(54,116)	222,967
Balances (in shares) at Dec. 31, 2018	5,607,401
Increase (Decrease) in Stockholders' Equity
Stock-based compensation		309				309
Stock-based compensation (in shares)	3,333
Treasury shares purchased					(52)	(52)
Treasury shares purchased (in shares)	(753)
Cash dividends paid				(757)		(757)
Net income				5,128		5,128
Mark to market of foreign exchange hedges, net of $6 tax benefit and $10 tax benefit 2019 and 2018, respectively			(20)			(20)
Comprehensive income			(20)	5,128		5,108
Balances at Mar. 31, 2019	$ 661	$ 26,176	$ (33)	$ 254,939	$ (54,168)	$ 227,575
Balances (in shares) at Mar. 31, 2019	5,609,981