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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Statement of Cash Flows [Abstract]    
Net loss (including noncontrolling interests) $ (1,437) $ (1,670)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 39 23
Depreciation and amortization 45 199
Amortization of operating lease right-of-use assets 114 129
Changes in operating assets and liabilities:    
Accounts receivable and unbilled revenue, net 146 405
Inventory (1,121) (493)
Prepaid expenses and other current assets 98 299
Accounts payable and accrued expenses 22 (657)
Deferred revenues (1) (15)
Operating lease obligations (184) (210)
Net cash used in operating activities (2,279) (1,990)
Cash flows from investing activities:    
Purchase of property and equipment (5) (62)
Net cash used in investing activities (5) (62)
Cash flows from financing activities:    
Principal payments on finance lease obligations (61) (148)
Net cash used in financing activities (61) (148)
Effect of exchange rate changes on cash 88 (128)
Net decrease in cash (2,257) (2,328)
Cash at beginning of period 17,383 10,473
Cash at end of period 15,126 8,145
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 44 36
Cash paid for interest $ 2 $ 5