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Condensed Consolidated Statements of Cash Flows - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash flows from operating activities:    
Net loss $ (6,319,000) $ (5,531,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,302,000 3,738,000
Amortization of operating lease right-of-use assets 259,000 255,000
Amortization of deferred financing costs and debt discount 118,000 109,000
Change in allowance for credit losses 116,000 (40,000)
Stock-based compensation expense 469,000 301,000
Loss on disposal of property and equipment 83,000 38,000
Settlement gains (684,000) 0
Inventory write-off 0 141,000
Changes in operating assets and liabilities:    
Accounts receivable 1,633,000 37,000
Inventories (630,000) 14,000
Prepaid expenses and other assets (133,000) 15,000
Accounts payable 474,000 (1,638,000)
Accrued expenses and other liabilities (1,200,000) 2,118,000
Deferred revenues 202,000 170,000
Operating lease liabilities (245,000) (242,000)
Net cash used in operating activities (2,555,000) (515,000)
Cash flows from investing activities:    
Purchase of property and equipment (1,156,000) (1,132,000)
Net cash used in investing activities (1,156,000) (1,132,000)
Cash flows from financing activities:    
Payment of contingent consideration 0 (18,000)
Sale of common stock, net of offering costs 2,192,000 1,943,000
Net cash provided by financing activities 2,192,000 1,925,000
Net (decrease) increase in cash, cash equivalents and restricted cash (1,519,000) 278,000
Cash, cash equivalents and restricted cash at beginning of period 8,595,000 8,118,000
Cash, cash equivalents and restricted cash at end of period 7,076,000 8,396,000
Cash and cash equivalents 7,076,000 7,062,000
Restricted cash 0 1,334,000
Supplemental disclosure of cash flow information:    
Cash paid during the year for interest 1,366,000 1,490,000
Supplemental schedule of non-cash operating, investing and financing activities:    
Operating lease right-of-use assets obtained in exchange for operating lease liabilities 0 977,000
Transfer of property and equipment to inventories 182,000 226,000
Accrued payment of contingent consideration 0 44,000
Property and equipment included in accounts payable 98,000 0
Accrued exit fee recorded as debt discount $ 0 $ 150,000