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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:    
Net income (loss) before dividends on redeemable convertible preferred stock $ (7,060) $ (2,593)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:    
Deferred income tax provision (benefit) (75) 195
Equity income from foreign joint ventures’ operations (529) (741)
Depreciation and amortization 877 894
Stock based compensation 563 585
Bad debt expense 214 172
Obsolete inventory expense 40 460
(Gain)/loss on sale of property and equipment (75) 96
Deferred compensation costs (45) 15
Change in operating assets and liabilities:    
Accounts receivable (1,111) 4,712
Inventories 104 983
Costs and estimated earnings in excess of billings on uncompleted contracts (3,008) 686
Prepaid expenses and other current assets 33 268
Accounts payable 4,327 (2,299)
Billings in excess of costs and estimated earnings on uncompleted contracts (1,421) (354)
Accrued liabilities and other current liabilities 566 (712)
Net cash (used in) provided by operating activities (6,600) 2,367
Cash flows from investing activities:    
Proceeds from sales of property and equipment 309  
Purchases of property, plant and equipment and other assets (725) (588)
Proceeds from foreign joint ventures’ operations dividends 589 1,170
Proceeds from sale of Assets Held for Sale   723
Purchase of certificate of deposits   (509)
Net cash provided by from investing activities 173 796
Cash flows from financing activities:    
Proceeds from sale of common stock, preferred stock, and warrants 18 29
Treasury stocks purchase (71) (70)
Preferred stock cash dividend (75) (75)
Proceeds from long-term notes payable   4,500
Advances from revolving credit facility (repayments) 457 1,043
Payments on long-term notes payable (300) (4,000)
Net cash provided by financing activities 29 1,427
Effect of exchange rates on cash 27 (151)
Net (decrease) increase in cash and cash equivalents (6,371) 4,439
Cash and cash equivalents, beginning of period 7,989 3,550
Cash and cash equivalents, end of period 1,618 7,989
Supplemental disclosures of cash flow information:    
Interest paid 235 159
Income taxes paid $ 60 $ 178