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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (34,020) $ (101,519)
Adjustments to reconcile loss to net cash used in operating activities:    
Depreciation and amortization 94 288
(Accretion) amortization of investments (1,853) 575
Stock-based compensation 7,391 14,724
Amortization of intangible asset 1,403 1,273
Changes in assets and liabilities:    
Accounts receivable, net 8,260 19,711
Inventory 43,013 (80,094)
Prepaid and other current assets (23,814) (9,907)
Other long-term assets (522)  
Interest receivable 104 229
Deferred revenue (9,990) (701)
Accounts payable and other current liabilities 11,627 (8,657)
Other long-term liabilities (1,497) 647
Net cash provided by (used in) operating activities 196 (163,431)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of furniture, fixtures and equipment (23)  
Maturities of securities 96,993 186,411
Purchases of securities (82,260) (14,172)
Net cash provided by investing activities 14,710 172,239
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 1,878 49
Taxes paid related to stock-based awards (1,694) (693)
Net cash provided by (used in) financing activities 424 (261)
NET INCREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH 15,330 8,547
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD 218,189 223,372
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD 233,519 231,919
Cash (paid) received during the year for:    
Income taxes (671) (2,112)
Supplemental disclosure of non-cash transactions:    
Initial recognition of operating lease right-of-use asset 580 $ 1,052
Initial recognition of furniture, fixtures and equipment lease $ 624