CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2014	$ 346	$ 44,854	$ 31,465	$ (1,316)	$ (5,836)	$ 69,513
Balance (in shares) at Dec. 31, 2014	17,275,000				(1,708,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)			(891)			(891)
Issuance of common stock upon the exercise of stock options	$ 2	472				474
Issuance of common stock upon the exercise of stock options (in shares)	94,000
Net issuance of restricted stock awards	$ (1)					(1)
Net issuance of restricted stock awards (in shares)	(17,000)
Equity based compensation		487				487
Stock options and awards tax benefits		(60)				(60)
Translation adjustments, net of tax				(1,462)		(1,462)
Balance at Dec. 31, 2015	$ 347	45,753	30,574	(2,778)	$ (5,836)	$ 68,060
Balance (in shares) at Dec. 31, 2015	17,352,000				(1,708,000)	15,644,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)			1,783			$ 1,783
Issuance of common stock upon the exercise of stock options	$ 1	26				$ 27
Issuance of common stock upon the exercise of stock options (in shares)	5,000					5,000
Net issuance of restricted stock awards	$ 2					$ 2
Net issuance of restricted stock awards (in shares)	122,000
Equity based compensation		469				469
Stock options and awards tax benefits		(45)				(45)
Translation adjustments, net of tax				(716)		(716)
Balance at Dec. 31, 2016	$ 350	$ 46,203	$ 32,357	$ (3,494)	$ (5,836)	$ 69,580
Balance (in shares) at Dec. 31, 2016	17,479,000				(1,708,000)	15,771,345