CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital in excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance (in shares) at Dec. 31, 2017		17,677,000				(1,708,000)
Balance at Dec. 31, 2017	$ 68,986	$ 354	$ 48,349	$ 29,549	$ (3,430)	$ (5,836)
Net (loss) income	68			68
Equity based compensation	181		181
Foreign currency translation adjustments	423				423
Balance (in shares) at Mar. 31, 2018		17,677,000				(1,708,000)
Balance at Mar. 31, 2018	$ 69,658	$ 354	48,530	29,617	(3,007)	$ (5,836)
Balance (in shares) at Dec. 31, 2018	16,171,652	17,878,000				(1,708,000)
Balance at Dec. 31, 2018	$ 45,946	$ 357	50,251	5,427	(4,253)	$ (5,836)
Net (loss) income	(2,729)			(2,729)
Issuance of common stock upon the exercise of stock options (in shares)		78,000
Issuance of common stock upon the exercise of stock options	30	$ 0	30
Equity based compensation	248		248
Foreign currency translation adjustments	$ (10)				(10)
Balance (in shares) at Mar. 31, 2019	16,248,209	17,956,000				(1,708,000)
Balance at Mar. 31, 2019	$ 43,485	$ 357	$ 50,529	$ 2,698	$ (4,263)	$ (5,836)