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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Statement [Abstract]    
Net revenues $ 7,591 $ 5,716
Cost of revenue 5,677 4,566
Gross profit 1,914 1,150
Operating expenses:    
General and administrative 3,335 4,194
Selling 410 490
Total operating expenses 3,745 4,684
Foreign joint ventures:    
Equity income from joint ventures 953 656
Loss on liquidation of investment in MIEFE (210)  
Joint venture operations' related expenses (142) (250)
Net equity income from foreign joint venture operations 601 406
Loss from operations (1,230) (3,128)
Other income (expense):    
Interest expense (24) (50)
Other income (expense) (116) 26
Total other expense (140) (24)
Loss from continuing operations before income tax expense (benefit) (1,370) (3,152)
Income tax provision (benefit) 291 (2,955)
Net loss from continuing operations (1,661) (197)
Loss from discontinued operations, including gain on the sale of $4,521 (896) (2,031)
Net loss (2,557) (2,228)
Dividend and accretion of discount on redeemable convertible preferred stock (360) (356)
Net loss attributable to common stockholders $ (2,917) $ (2,584)
Loss per common share - basic and diluted:    
Continuing operations $ (0.23) $ (0.06)
Discontinued operations (0.10) (0.24)
Consolidated operations $ (0.33) $ (0.30)
Weighted - average number of common shares outstanding:    
Basic and diluted 8,892,585 8,525,645