CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2016	$ 57,533	$ 82	$ 20,031	$ (2,263)	$ 42,044	$ (2,361)
Balance (in shares) at Dec. 31, 2016		7,928,594
Net income	980	$ 0	0	0	980	0
Common stock options exercised	35	$ 0	35	0	0	0
Common stock options exercised (in shares)		3,500
Stock compensation expense	56	$ 0	56	0	0	0
Foreign currency translation adjustment, net of tax	1,116	0	0	0	0	1,116
Balance at Jun. 30, 2017	59,720	$ 82	20,122	(2,263)	43,024	(1,245)
Balance (in shares) at Jun. 30, 2017		7,932,094
Balance at Dec. 31, 2017	61,316	$ 82	19,272	(2,263)	44,718	(493)
Balance (in shares) at Dec. 31, 2017		7,932,094
Impact of change in accounting policy at Dec. 31, 2017	(409)	$ 0	0	0	(409)	0
Net income	2,507	0	0	0	2,507	0
Common stock options exercised	139	$ 0	139	0	0	0
Common stock options exercised (in shares)		22,429
Foreign currency translation adjustment, net of tax	(399)	$ 0	0	0	0	(399)
Balance at Jun. 30, 2018	$ 63,154	$ 82	$ 19,411	$ (2,263)	$ 46,816	$ (892)
Balance (in shares) at Jun. 30, 2018		7,954,523