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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net loss $ (6,738) $ (3,229)
Adjustments to reconcile net loss to net cash used in operating activities:    
Provision for credit losses 35 (168)
Depreciation and amortization 10,250 10,119
Impairment charge to goodwill and long-lived assets 1,137 5,990
Deferred income taxes 36 1
Loss on disposals of fixed assets 1,850 511
Compensation expense related to stock-based awards and employee stock purchase plan 1,629 1,433
Unrealized currency translation loss (gain) 280 (150)
Changes in operating assets and liabilities:    
Accounts receivable 896 (593)
Inventories (6,157) (3,693)
Prepaid expenses and other current assets (16,128) (1,544)
Other non-current assets 692 1,054
Accounts payable 5,404 (16,758)
Deferred revenue (270) 230
Accrued compensation, product warranty and other (6,489) 4,119
Net cash used in operating activities (13,573) (2,678)
Cash flows from investing activities:    
Capital expenditures (6,570) (7,170)
Cash paid for acquisition of intangible asset (31) (35)
Purchases of marketable securities (1,892) (17,441)
Maturities and sales of marketable securities 25,000 15,422
Net cash provided by (used in) investing activities 16,507 (9,224)
Cash flows from financing activities:    
Proceeds from stock options exercised and employee stock purchase plan 96 2,604
Purchase of treasury stock 0 (239)
Payment of finance lease 0 (22)
Net cash provided by financing activities 96 2,343
Effect of exchange rate changes on cash and cash equivalents 72 (13)
Net increase (decrease) in cash and cash equivalents 3,102 (9,572)
Cash and cash equivalents at beginning of period 11,294 21,056
Cash and cash equivalents at end of period 14,396 11,484
Supplemental disclosure of non-cash investing and financing activities:    
Changes in accrued other and accounts payable related to property and equipment additions $ 31 $ 3