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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash flows from operating activities:    
Net loss (including noncontrolling interests) $ (3,506) $ (2,878)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 45
Depreciation and amortization 376 373
Amortization of operating lease right-of-use assets 259 183
Changes in operating assets and liabilities:    
Accounts receivable and unbilled revenue, net 511 588
Projects in process 7
Inventory (880) (42)
Prepaid expenses and other current assets 481 155
Accounts payable and accrued expenses (343) (169)
Deferred revenues (6) 33
Operating lease obligations (342) (178)
Net cash used in operating activities (3,405) (1,928)
Cash flows from investing activities:    
Purchase of property and equipment (67) (7)
Net cash used in investing activities (67) (7)
Cash flows from financing activities:    
Proceeds from short-term borrowings 966
Proceeds from short-term tax credits   542
Principal payments on finance lease obligations (295) (164)
Net cash (used in) provided by financing activities (295) 1,344
Effect of exchange rate changes on cash (95) 7
Net decrease in cash (3,862) (584)
Cash at beginning of period 10,473 2,357
Cash at end of period 6,611 1,773
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 73 19
Cash paid for interest $ 8 $ 13