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Condensed Consolidated Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Income Statement [Abstract]        
Net sales $ 14,283 $ 16,236 $ 43,561 $ 42,743
Cost of sales 13,788 13,477 38,603 35,130
Gross profit 495 2,759 4,958 7,613
Operating expenses:        
Research and development 425 112 651 356
Selling and marketing 617 500 1,850 1,587
General and administrative 1,640 1,176 3,995 3,566
Total operating expenses 2,682 1,788 6,496 5,509
Income (loss) from consolidated continuing operations (2,187) 971 (1,538) 2,104
Net equity income from foreign joint ventures’ operations:        
Equity income from foreign joint ventures’ operations 350 434 1,934 3,140
Foreign joint ventures’ operations related expenses (122) (66) (412) (204)
Net equity income from foreign joint ventures’ operations 228 368 1,522 2,936
Income (loss) from consolidated continuing operations and net equity income from foreign joint ventures’ operations (1,959) 1,339 (16) 5,040
Other income (expense):        
Interest expense and other, net (23) (27) (56) (72)
Continuing operations income (loss) before income taxes (1,982) 1,312 (72) 4,968
Provision for income taxes on continuing operations   110   745
Net income (loss) from continuing operations (1,982) 1,202 (72) 4,223
Discontinued operations income (loss) (21) (215) (2,673) (350)
Provision for income taxes on discontinued operations 0 0 0 0
Net income (loss) from discontinued operations (21) (215) (2,673) (350)
Net income (loss) before dividends on redeemable convertible preferred stock (2,003) 987 (2,745) 3,873
Dividends on redeemable convertible preferred stock (86) (86) (258) (256)
Net income (loss) attributable to common stockholders $ (2,089) $ 901 $ (3,003) $ 3,617
Earnings (loss) from continuing operations per common share:        
Basic $ (0.25) $ 0.14 $ (0.04) $ 0.50
Diluted $ (0.25) $ 0.13 $ (0.04) $ 0.45
Weighted - average number of continuing operations shares outstanding:        
Basic 8,180,970 8,004,026 8,137,133 7,985,318
Diluted 8,180,970 9,497,056 8,137,133 9,450,719
Loss per common share from discontinued operations:        
Basic and diluted $ 0.00 $ (0.03) $ (0.33) $ (0.04)
Total Earnings (loss) per common share:        
Basic $ (0.26) $ 0.11 $ (0.37) $ 0.45
Diluted $ (0.26) $ 0.10 $ (0.37) $ 0.41
Weighted - average number of common shares outstanding:        
Basic 8,180,970 8,004,026 8,137,133 7,985,318
Diluted 8,180,970 9,497,056 8,137,133 9,450,719