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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Cash flows from operating activities:    
Net loss $ (4,445) $ (1,079)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 758 891
Amortization of intangible assets 2,920 2,929
Amortization of deferred financing costs 140 140
Stock-based compensation expense 2,262 2,132
Deferred income taxes and other 1,040 (303)
Investment in Convertible Preferred Stock - Note 13 (3,900) 0
Changes in operating assets and liabilities:    
Accounts receivable 3,587 323
Inventories (2,667) (2,526)
Other assets (250) (1,517)
Accounts payable and accrued expenses (435) 1,629
Deferred revenue (611) (100)
Other liabilities (575) (714)
Net cash (used in) provided by operating activities (2,176) 1,805
Cash flows from investing activities:    
Additions to property, plant and equipment (913) (357)
Additions to intangible assets 0 (150)
Net cash used in investing activities (913) (507)
Cash flows from financing activities:    
Borrowing on bank line of credit 5,300 0
Repayment on bank line of credit (3,600) (4,000)
Repayment of term debt (1,686) (1,000)
Debt issuance costs 0 (102)
Proceeds from exercise of stock options 282 2,759
Taxes paid related to net share settlement of equity awards (780) (990)
Net cash used in financing activities (484) (3,333)
Effect of exchange rate changes on cash 11 (45)
Decrease in cash and cash equivalents (3,562) (2,080)
Cash and cash equivalents at beginning of period 7,821 8,317
Cash and cash equivalents at end of period 4,259 6,237
Cash paid for interest 845 834
Cash paid for income taxes, net of refunds $ 352 $ 168