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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash flows from operating activities:    
Net loss $ (317) $ (2,030)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 724 801
Depreciation and amortization 517 476
Provision for excess and obsolete inventory 1,253
Gain on sales of equipment (625)
Changes in assets and liabilities, net of effects of sale of equipment:    
Accounts receivable (525) (3,218)
Contract assets (2,726) 256
Inventories 103 633
Other current assets 402 48
Other assets 8
Accounts payable 431 140
Accrued expenses (273) 138
Contract liabilities (2,411) (1,620)
Net cash used in operating activities (4,075) (3,740)
Cash flows from investing activities:    
Purchases of property and equipment (49) (219)
Investment in captive insurance company (51)
Net cash used in investing activities (100) (219)
Cash flows from financing activities    
Payments of long-term debt (65) (61)
Net cash used in financing activities (65) (61)
Net decrease in cash and cash equivalents (4,240) (4,020)
Cash and cash equivalents at beginning of period 12,598 14,025
Cash and cash equivalents at end of period 8,358 10,005
Supplemental disclosure of cash flow information:    
Income taxes paid 26 2
Interest paid $ 10 $ 14