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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net loss $ (1,710) $ (3,163)
Adjustments to reconcile net loss to net cash used in operating activities:    
Provision for credit losses 97 54
Depreciation and amortization 2,888 3,247
Deferred income taxes 46 36
(Gain) loss on disposals of fixed assets (27) 683
Compensation expense related to stock-based awards and employee stock purchase plan 337 522
Unrealized currency translation loss 726 241
Changes in operating assets and liabilities:    
Accounts receivable (1,650) (355)
Inventories 971 (44)
Prepaid expenses and other current assets (351) 100
Other non-current assets 144 328
Accounts payable (964) 2,184
Deferred revenue 734 400
Accrued compensation, product warranty and other (2,518) (5,025)
Net cash used in operating activities (1,277) (792)
Cash flows from investing activities:    
Capital expenditures (1,149) (2,399)
Cash paid for acquisition of intangible asset (43) (10)
Proceeds from sale of fixed assets 635 0
Purchases of marketable securities 0 (720)
Maturities and sales of marketable securities 0 4,000
Net cash (used in) provided by investing activities (557) 871
Cash flows from financing activities:    
Proceeds from stock options exercised and employee stock purchase plan 1 96
Purchase of treasury stock (163) 0
Net cash (used in) provided by financing activities (162) 96
Effect of exchange rate changes on cash and cash equivalents 24 (28)
Net (decrease) increase in cash and cash equivalents (1,972) 147
Cash and cash equivalents at beginning of period 50,572 11,294
Cash and cash equivalents at end of period 48,600 11,441
Supplemental disclosure of non-cash investing and financing activities:    
Amounts in accrued other and accounts payable related to property and equipment additions $ 186 $ 5