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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Cash flows from operating activities:    
Net loss $ (12,405) $ (3,415)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 1,727 1,473
Amortization of intangible assets 5,430 5,525
Amortization of deferred financing costs 327 280
Stock-based compensation 4,340 5,000
Deferred income taxes and other 363 336
Loss on equity securities - Note 12 1,593 632
Gain on sale of product line - Note 17 0 (403)
Changes in operating assets and liabilities:    
Accounts receivable 974 810
Inventories (64) 1,524
Other assets 1,642 1,651
Accounts payable and other liabilities (1,785) (523)
Contract liabilities (702) 1,138
Net cash provided by operating activities 1,440 14,028
Cash flows from investing activities:    
Additions to property, plant and equipment (2,644) (1,788)
Capitalized software development costs (619) (523)
Proceeds from sale of product line 0 512
Proceeds from sale of marketable equity securities 1,919 0
Net cash used in investing activities (1,344) (1,799)
Cash flows from financing activities:    
Borrowing from revolving line of credit 8,800 4,500
Repayment of revolving line of credit (2,550) (10,950)
Repayment of term debt (6,023) (4,091)
Payment of debt issuance costs (161) 0
Proceeds from exercise of stock options and employee stock purchase plan 380 930
Taxes paid related to net share settlement of equity awards (577) (2,523)
Net cash used in financing activities (131) (12,134)
Effect of exchange rate changes on cash (140) (320)
Decrease in cash and cash equivalents (175) (225)
Cash and cash equivalents at beginning of period 4,283 4,508
Cash and cash equivalents at end of period 4,108 4,283
Supplemental disclosures of cash flow information:    
Cash paid for interest 3,235 3,795
Cash paid for income taxes, net of refunds $ (159) $ 207