Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 8,673	$ 13,780	$ 28,415	$ 41,393
Cost of sales	9,124	11,219	27,549	34,505
Gross margin	(451)	2,561	866	6,888
Operating expenses:
Research and development	145	276	864	504
Selling and marketing	466	546	1,759	1,642
General and administrative	1,587	1,523	3,914	4,046
Total operating expenses	2,198	2,345	6,537	6,192
Income (loss) from operations	(2,649)	216	(5,671)	696
Net equity income (loss) from foreign joint ventures’ operations:
Equity income (loss) from foreign joint ventures’ operations	215	225	367	625
Foreign joint ventures’ operations related expenses	(53)	(103)	(202)	(310)
Net equity income (loss) from foreign joint ventures’ operations	162	122	165	315
Income (loss) from operations and net equity income from foreign joint ventures’ operations	(2,487)	338	(5,506)	1,011
Other income (expense):
Interest expense and other, net	(78)	(93)	200	(157)
Foreign transaction gain		(134)
Income (loss) before income taxes	(2,565)	111	(5,306)	854
Provision for (benefit from) income taxes	59	(93)	50	(171)
Net income (loss) before dividends on redeemable convertible preferred stock	(2,624)	204	(5,356)	1,025
Dividends on redeemable convertible preferred stock	(89)	(87)	(265)	(261)
Net income (loss) attributable to common stockholders	$ (2,713)	$ 117	$ (5,621)	$ 764
Earnings (loss) per common share:
Basic	$ (0.33)	$ 0.01	$ (0.68)	$ 0.09
Diluted	$ (0.33)	$ 0.01	$ (0.68)	$ 0.08
Weighted - average number of common shares outstanding:
Basic	8,327,009	8,252,396	8,294,268	8,236,212
Diluted	8,327,009	8,252,396	8,294,268	9,277,929

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