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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash flows from operating activities:    
Net loss $ (495) $ (2,964)
Adjustments to reconcile net loss to net cash used in operating activities:    
Equity income from foreign joint venture operations (265) (171)
Depreciation and amortization 12 190
Stock-based compensation   162
Bad debt expense   15
Deferred compensation costs (13) (12)
Amortization of debt issuance costs   28
Change in operating assets and liabilities:    
Accounts receivable 186 321
Inventories (2) (611)
Contract assets (285) 2,154
Prepaid expenses and other current assets (119) 196
Accounts payable and accrued liabilities (399) (1,301)
Contract liabilities   479
Net cash used in operating activities (1,380) (1,514)
Cash flows from investing activities:    
Purchases of property, plant and equipment and other assets (18) (79)
Net cash used in investing activities (18) (79)
Cash flows from financing activities:    
Proceeds from sale of common stock, preferred stock and warrants   5
Treasury stocks purchase   (18)
Proceeds from short-term notes payable 334  
Payments on short-term notes payable   (59)
Net cash provided by (used in) financing activities 334 (72)
Effect of exchange rate changes on cash (54) 3
Net decrease in cash and cash equivalents (1,118) (1,662)
Cash and cash equivalents, beginning of period 2,124 2,289
Cash and cash equivalents, end of period $ 1,006 $ 627