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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net loss $ (24,072) $ (23,211)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,088 3,211
Stock-based compensation 3,042 3,677
Deferred income tax expense (86) 314
Reversal of uncertain tax positions (3) (2)
Changes in operating assets and liabilities:    
Accounts receivable, net 5,578 (118)
Inventories (430) (4,145)
Prepaid expenses and other current and long-term assets, net 3,287 4,683
Accounts payable (475) 1,133
Accrued current and long-term liabilities (4,261) (2,268)
Income taxes payable 126 (300)
Net cash used in operating activities (14,206) (17,026)
Cash flows from investing activities:    
Purchases of property and equipment (3,647) (3,440)
Net cash used in investing activities (3,647) (3,440)
Cash flows from financing activities:    
Payments on asset financings (1,041) (932)
Proceeds from issuance of common stock under employee equity incentive plans 180 299
Net proceeds from issuance of equity interest to non-controlling interest 0 14,596
Net cash provided by (used in) financing activities (861) 13,963
Net decrease in cash and cash equivalents (18,714) (6,503)
Cash and cash equivalents, beginning of period 47,544 56,821
Cash and cash equivalents, end of period 28,830 50,318
Supplemental disclosure of cash flow information:    
Cash paid during the period for income taxes, net of refunds received 225 302
Cash paid during the period for interest 78 116
Non-cash investing and financing activities:    
Acquisitions of property and equipment and other assets, unpaid at period end. $ 554 $ 1,980