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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Statement [Abstract]    
Net sales $ 37,812 $ 49,083
Cost of sales 36,796 42,493
Gross profit 1,016 6,590
Operating expenses:    
Research and development 962 769
Selling and marketing 2,181 2,380
General and administrative 5,242 5,782
Total operating expenses 8,385 8,931
Loss from operations (7,369) (2,341)
Net equity income from foreign joint ventures’ operations:    
Equity income from foreign joint ventures’ operations 529 741
Foreign joint ventures’ operations related expenses (245) (393)
Net equity income from foreign joint ventures’ operations 284 348
Loss from operations and net equity income from foreign joint ventures’ operations (7,085) (1,993)
Other income (expense):    
Interest expense and other, net 69 (172)
Loss before income taxes (7,016) (2,165)
Provision for (benefit from) income taxes 44 428
Net loss before dividends on redeemable convertible preferred stock (7,060) (2,593)
Dividends on redeemable convertible preferred stock (353) (349)
Net loss attributable to common stockholders [1],[2] $ (7,413) $ (2,942)
Earnings (loss) per common share:    
Basic $ (0.89) $ (0.36)
Diluted $ (0.89) $ (0.36)
Weighted - average number of common shares outstanding:    
Basic 8,305,764 8,241,585
Diluted 8,305,764 8,241,585
[1] Net income (loss) represents net income (loss) from continuing operations less the dividends on redeemable convertible preferred stock.
[2] Net of preferred dividends of $353 and $349 in 2016 and 2015, respectively.