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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net loss $ (1,733) $ (2,084)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 2
Depreciation and amortization 9 27
Amortization of operating lease right-of-use assets 82 17
Inventory impairment loss 278
Changes in operating assets and liabilities:    
Accounts receivable and unbilled revenues, net (5) (170)
Inventory (253)
Prepaid expenses and other current assets 28 136
Accounts payable, accrued payroll and employee benefits, and accrued expenses 262 76
Contract liabilities 75 73
Operating lease obligations (78) (17)
Net cash used in operating activities (1,360) (1,915)
Cash flows from investing activities:    
Purchase of property and equipment (40)
Net cash used in investing activities (40)
Cash flows from financing activities:    
Principal payments on finance lease obligations (2) (9)
Net cash used in financing activities (2) (9)
Effect of exchange rate changes on cash and cash equivalents (34) 43
Net change in cash and cash equivalents (1,436) (1,881)
Cash and cash equivalents at beginning of period 16,427 16,155
Cash and cash equivalents at end of period 14,991 14,274
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 10 10
Cash paid for interest 1
Supplemental disclosure of non-cash investing and financial activities:    
Property and equipment obtained in exchange for finance lease obligations $ 28