Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net sales	$ 1,701	$ 2,515	$ 3,518	$ 6,261
Cost of sales	2,613	3,490	5,442	5,935
Gross (loss) profit	(912)	(975)	(1,924)	326
Selling, general and administrative expenses	1,225	1,380	2,562	3,072
Research and development expense	189	190	383	405
Provision for bad debt expense	486	67	790	6
Operating loss	(2,812)	(2,612)	(5,659)	(3,157)
Interest (expense) income, net	(11)	16	(12)	15
Other (expense) income, net	(44)	183	(69)	1,203
Gain (loss) on disposal of fixed assets	1	(383)	1	(383)
Foreign currency transaction gain (loss)	71	(106)		(162)
Loss before income tax (benefit) expense	(2,795)	(2,902)	(5,739)	(2,484)
Income tax (benefit) expense	(218)	172	(306)	271
Net loss	(2,577)	(3,074)	(5,433)	(2,755)
Other comprehensive loss:
Foreign currency translation (net of tax effect of $16, $(81), $(17) and $(36), respectively)	(9)	(542)	(128)	(88)
Other comprehensive loss	(9)	(542)	(128)	(88)
Comprehensive loss	$ (2,586)	$ (3,616)	$ (5,561)	$ (2,843)
Net loss per share (Note 3):
Basic (in dollars per share)	$ (0.13)	$ (0.16)	$ (0.27)	$ (0.14)
Diluted (in dollars per share)	$ (0.13)	$ (0.16)	$ (0.27)	$ (0.14)
Weighted–average shares outstanding (Note 3):
Basic (in shares)	20,152,029	19,669,353	20,152,029	19,607,204
Diluted (in shares)	20,152,029	19,669,353	20,152,029	19,607,204