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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Cash flows from operating activities:    
Net loss $ (7,621) $ (358)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 831 665
Amortization of intangible assets 2,751 2,777
Amortization of deferred financing costs 140 140
Stock-based compensation expense 2,326 2,255
Deferred income taxes and other 407 86
Loss on equity securities - Note 6 1,593 1,581
Gain on sale of product line - Note 14 0 (403)
Changes in operating assets and liabilities:    
Accounts receivable 3,458 (68)
Inventories (1,748) 398
Other assets (813) (1,268)
Accounts payable and other current liabilities 170 (270)
Contract liabilities (498) 445
Other liabilities (439) (616)
Net cash provided by operating activities 557 5,364
Cash flows from investing activities:    
Additions to property, plant and equipment (1,463) (741)
Capitalized software development costs (223) (108)
Proceeds from sale of product line 0 512
Proceeds from sale of marketable equity securities 1,919 0
Net cash (used in) provided by investing activities 233 (337)
Cash flows from financing activities:    
Borrowing from revolving line of credit 5,550 2,500
Repayment of revolving line of credit (2,550) (5,450)
Repayment of term debt (4,023) (2,591)
Proceeds from exercise of stock options and employee stock purchase plan 204 724
Taxes paid related to net share settlement of equity awards (59) (451)
Net cash used in financing activities (878) (5,268)
Effect of exchange rate changes on cash (147) 57
Decrease in cash and cash equivalents (235) (184)
Cash and cash equivalents at beginning of period 4,283 4,508
Cash and cash equivalents at end of period 4,048 4,324
Supplemental disclosures of cash flow information:    
Cash paid for interest 1,515 2,148
Cash paid for income taxes, net of refunds $ 131 $ 115