UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Beginning balance, shares at Dec. 31, 2017	21,489,000
Beginning balance, value at Dec. 31, 2017	$ 71,582	$ 119,537	$ (7,182)
Common stock issued upon exercise of options and warrants, shares	308,000
Common stock issued upon exercise of options and warrants, value	$ 475
Repurchase of common stock, shares	(355,000)
Repurchase of common stock, value	$ (1,419)
Stock-based compensation	$ 1,186
Pension benefit obligation			0	$ 0
Net income		3,145		3,145
Ending balance, shares at Mar. 31, 2018	21,442,000
Ending balance, value at Mar. 31, 2018	$ 71,824	122,682	(7,182)	187,324
Beginning balance, shares at Dec. 31, 2018	22,422,000
Beginning balance, value at Dec. 31, 2018	$ 70,273	134,399	(7,554)	197,118
Common stock issued upon exercise of options and warrants, shares	78,000
Common stock issued upon exercise of options and warrants, value	$ 73
Repurchase of common stock, shares	(366,000)
Repurchase of common stock, value	$ (1,440)
Stock-based compensation	$ 638
Pension benefit obligation			0	0
Net income		1,739		1,739
Ending balance, shares at Mar. 31, 2019	22,134,000
Ending balance, value at Mar. 31, 2019	$ 69,544	$ 136,138	$ (7,554)	$ 198,128