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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss $ (3,415) $ (9,516)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 1,473 1,453
Amortization of intangible assets 5,525 6,122
Amortization of deferred financing costs 280 280
Stock-based compensation expense 5,000 4,411
Deferred income taxes and other 336 (414)
Unrealized loss on equity securities - Note 16 632 (0)
Convertible preferred stock received in litigation settlement - Note 16 0 (3,900)
Gain on sale of product line (403) 0
Changes in operating assets and liabilities:    
Accounts receivable 810 4,780
Inventories 1,524 252
Other assets 1,651 474
Accounts payable and other current liabilities 555 (1,399)
Contract liabilities 1,138 (896)
Other liabilities (1,078) (495)
Net cash provided by operating activities 14,028 1,152
Cash flows from investing activities:    
Additions to property, plant and equipment (1,788) (1,590)
Capitalized software development costs (523) 0
Proceeds from sale of product line 512 0
Net cash used in investing activities (1,799) (1,590)
Cash flows from financing activities:    
Borrowing from revolving line of credit 4,500 7,800
Repayment of revolving line of credit (10,950) (6,400)
Repayment of term debt (4,091) (3,186)
Proceeds from exercise of stock options and employee stock purchase plan 930 577
Taxes paid related to net share settlement of equity awards (2,523) (1,628)
Net cash used in financing activities (12,134) (2,837)
Effect of exchange rate changes on cash (320) (38)
Decrease in cash and cash equivalents (225) (3,313)
Cash and cash equivalents at beginning of period 4,508 7,821
Cash and cash equivalents at end of period 4,283 4,508
Cash paid for interest 3,795 2,314
Cash paid for income taxes, net of refunds $ 207 $ 534