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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Cash flows from operating activities:    
Net loss $ (7,850) $ (1,249)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 1,122 1,311
Amortization of intangible assets 4,492 4,388
Amortization of deferred financing costs 210 210
Stock-based compensation expense 3,401 3,136
Deferred income taxes and other (160) (498)
Investment in Convertible Preferred Stock - Note 13 (3,900) 0
Changes in operating assets and liabilities:    
Accounts receivable 6,060 (727)
Inventories (329) (4,048)
Other assets (811) (2,088)
Accounts payable and accrued expenses (2,379) 1,901
Deferred revenue (551) (142)
Other liabilities (832) (1,049)
Net cash (used in) provided by operating activities (1,527) 1,145
Cash flows from investing activities:    
Additions to property, plant and equipment (1,355) (837)
Additions to intangible assets 0 (150)
Net cash used in investing activities (1,355) (987)
Cash flows from financing activities:    
Borrowing on bank line of credit 7,800 2,500
Repayment on bank line of credit (4,650) (4,000)
Repayment of term debt (2,436) (1,500)
Debt issuance costs 0 (102)
Proceeds from exercise of stock options and employee stock purchase plan 346 2,909
Taxes paid related to net share settlement of equity awards (1,167) (2,653)
Net cash used in financing activities (107) (2,846)
Effect of exchange rate changes on cash 312 (81)
Decrease in cash and cash equivalents (2,677) (2,769)
Cash and cash equivalents at beginning of period 7,821 8,317
Cash and cash equivalents at end of period 5,144 5,548
Cash paid for interest 1,529 836
Cash paid for income taxes, net of refunds $ 493 $ 506