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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash flows from operating activities:    
Net (loss) income $ (4,694) $ 622
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation 404 333
Amortization of intangible assets 1,377 1,388
Amortization of deferred financing costs 70 70
Stock-based compensation expense 1,048 1,153
Deferred income taxes and other 178 (55)
Loss on equity securities - Note 6 1,312 0
Gain on sale of product line - Note 14 0 (403)
Changes in operating assets and liabilities:    
Accounts receivable 704 (923)
Inventories (617) (292)
Other assets (298) (308)
Accounts payable and other current liabilities 2,469 (150)
Contract liabilities (120) 741
Other liabilities (430) (364)
Net cash provided by operating activities 1,403 1,812
Cash flows from investing activities:    
Additions to property, plant and equipment (645) (224)
Capitalized software development costs (75) 0
Proceeds from sale of product line 0 512
Proceeds from sale of marketable equity securities 495 0
Net cash (used in) provided by investing activities (225) 288
Cash flows from financing activities:    
Borrowing from revolving line of credit 2,500 1,500
Repayment of revolving line of credit (500) (2,500)
Repayment of term debt (3,023) (1,841)
Proceeds from exercise of stock options and employee stock purchase plan 15 104
Taxes paid related to net share settlement of equity awards (47) (156)
Net cash used in financing activities (1,055) (2,893)
Effect of exchange rate changes on cash (151) 74
Decrease in cash and cash equivalents (28) (719)
Cash and cash equivalents at beginning of period 4,283 4,508
Cash and cash equivalents at end of period 4,255 3,789
Cash paid for interest 768 1,172
Cash paid for income taxes, net of refunds $ 26 $ (134)