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, 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 tax benefit of $2 and $6 for the 2020 and 2019 periods, 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
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 $6 for the 2020 and 2019 periods, 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