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Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating activities    
Net income (loss) $ 4,639 $ (32,933)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation 318 810
Amortization of finance lease right-of-use assets 9 10
Net accretion of premium and discount on investments (1) (1,294)
Investment loss (income) in unconsolidated variable interest entity 554 (589)
Stock-based compensation 2,852 8,762
Changes in operating assets and liabilities:    
Accounts receivable, net (3,160) (24,685)
Inventories 2,859 13,786
Prepaid expenses and other current assets 52,584 5,271
Operating lease right-of-use assets 306 3,286
Other assets 648 219
Accounts payable (24,766) (13,587)
Accrued and other liabilities (31,706) (2,989)
Operating lease liabilities, current (220) 1,180
Deferred revenues (4,142) (10,202)
Accrued interest expense related to sale of future revenues 1,702 (3,638)
Accrued interest for finance lease liabilities (6) 14
Operating lease liabilities, non-current (169) (4,001)
Other long-term liabilities 418 1,292
Net cash provided by (used in) operating activities 2,719 (59,288)
Investing activities    
Purchases of property and equipment (16) (29)
Purchases of available-for-sale securities 0 (8,628)
Proceeds from maturities of investments 0 59,933
Net cash provided by (used in) investing activities (16) 51,276
Financing activities    
Repayments of finance lease liabilities (5) (12)
Cash paid for payroll taxes on restricted stock unit releases (37) (153)
Payment of issuance cost under ATM Program (46) 0
Net cash used in financing activities (88) (165)
Effect of exchange rate change on cash and cash equivalents 1,407 223
Net increase (decrease) in cash and cash equivalents 4,022 (7,954)
Total cash and cash equivalents at beginning of period 102,178 113,688
Total cash and cash equivalents at end of period $ 106,200 $ 105,734