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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from operating activities:    
Net loss $ (4,903) $ (3,554)
Adjustments to reconcile net loss to net cash used in operating activities:    
Deferred income tax provision (benefit)   (151)
Equity income from foreign joint ventures’ operations (455) (186)
Depreciation and amortization 377 436
Stock based compensation 284 186
Bad debt expense 30 (157)
Obsolete inventory expense   66
Deferred compensation costs (25) (23)
Amortization of debt issuance costs 55 31
Change in operating assets and liabilities:    
Accounts receivable 268 159
Inventories (107) 9
Costs and estimated earnings in excess of billings on uncompleted contracts 3,247 (1,031)
Prepaid expenses and other current assets 48 (12)
Accounts payable (1,992) 807
Billings in excess of costs and estimated earnings on uncompleted contracts 2,009 4,179
Accrued liabilities and other current liabilities 1,514 (331)
Net cash provided by operating activities 350 428
Cash flows from investing activities:    
Dividends received from joint ventures 1,127 780
Purchases of property, plant and equipment and other assets (165) (133)
Net cash provided by from investing activities 962 647
Cash flows from financing activities:    
Proceeds from sale of common stock, preferred stock, and warrants 8 8
Treasury stocks purchase (18) (30)
Proceeds from long-term notes payable   7,000
Proceeds from short-term notes payable   200
Payments on revolving credit facility   (1,500)
Payments on long-term notes payable   (4,200)
Payments on short-term notes payable (60) (500)
Payments of debt issuance costs   (427)
Other financial activities, net (146)  
Net cash provided by (used in) by financing activities (216) 551
Effect of exchange rate changes on cash (50) (2)
Net decrease in cash and cash equivalents 1,046 1,624
Cash and cash equivalents, beginning of period 2,289 1,618
Cash and cash equivalents, end of period 3,335 3,242
Supplemental disclosures of cash flow information:    
Interest paid 506 332
Non-cash investing and financing transactions:    
Issuance of shares of common stock on accrued preferred dividends payables $ 225 $ 300