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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (53,331) $ (106,659)
Adjustments to reconcile loss to net cash used in operating activities:    
Depreciation and amortization 127 426
(Accretion) amortization of investments (2,583) 757
Stock-based compensation 10,999 19,601
Amortization of intangible asset 2,104 1,909
Changes in assets and liabilities:    
Accounts receivable, net 8,590 40,274
Inventory 46,099 (59,640)
Prepaid and other current assets 28 (5,706)
Other long-term assets (313)  
Interest receivable 204 483
Deferred revenue (10,372) (1,012)
Accounts payable and other current liabilities 7,386 (74,672)
Other long-term liabilities (1,413) 2,595
Net cash provided by (used in) operating activities 7,525 (181,644)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of furniture, fixtures and equipment (24)  
Maturities of securities 160,997 240,614
Purchases of securities (115,496) (37,507)
Net cash provided by investing activities 45,477 203,107
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from the sale of common stock, net of transaction costs 240 383
Proceeds from exercise of stock options, net of transaction costs 1,880 59
Taxes paid related to stock-based awards (1,973) (859)
Net cash provided by (used in) financing activities 147 (417)
NET INCREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH 53,149 21,046
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD 218,189 223,372
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD 271,338 244,418
Cash paid during the year for:    
Income taxes (1,103) (1,490)
Supplemental disclosure of non-cash transactions:    
Initial recognition of operating lease right-of-use asset 430 $ 1,148
Initial recognition of furniture, fixtures and equipment lease $ 624