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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Cash flows from operating activities            
Net loss $ (60,725,000)   $ (66,869,000) $ (312,222,000) $ (224,717,000)  
Adjustments to reconcile net loss to net cash used in operating activities            
Depreciation       10,932,000 8,487,000  
Amortization of acquired intangible assets       20,558,000 1,408,000  
Amortization of right-of-use assets       10,912,000 4,940,000  
Share-based compensation expense       55,003,000 55,534,000  
Goodwill impairment 0 $ 0 0 93,200,000 0  
Merger-related compensation expense       0 3,395,000  
Accretion of discount and amortization of premium on marketable securities, net       (10,663,000) (10,088,000)  
Change in the estimated fair value of contingent consideration 1,170,000   (271,000) 1,100,000 13,960,000  
Loss on extinguishment of debt 0   0 0 2,033,000  
Inventory provision       3,715,000 4,691,000  
Deferred income taxes       0 (10,706,000)  
Other       1,002,000 667,000  
Changes in assets and liabilities            
Accounts receivable, net       7,232,000 (11,700,000)  
Inventory, net       (15,394,000) (22,849,000)  
Prepaid expenses and other assets       3,534,000 (7,287,000)  
Accounts payable       (2,222,000) 1,706,000  
Accrued expenses       (26,665,000) 2,055,000  
Deferred revenue       875,000 (4,867,000)  
Operating lease liabilities       (9,252,000) (6,396,000)  
Contingent consideration liability       0 (732,000)  
Other liabilities       (7,053,000) (1,147,000)  
Net cash used in operating activities       (175,408,000) (201,613,000)  
Cash flows from investing activities            
Purchase of property and equipment       (4,571,000) (6,819,000)  
Cash paid for purchase of Apton, net of cash acquired       0 (102,000)  
Purchases of investments       (418,164,000) (553,748,000)  
Sales of investments       8,061,000 595,000  
Maturities of investments       480,440,000 631,253,000  
Net cash provided by investing activities       65,766,000 71,179,000  
Cash flows from financing activities            
Proceeds from issuance of common stock under equity offerings, net of issuance costs       0 189,200,000  
Proceeds from issuance of common stock from equity plans       7,703,000 14,383,000  
Payment of debt issuance costs       0 (7,325,000)  
Payment of contingent consideration       0 (4,368,000)  
Notes payable principal payoff       (490,000) (1,397,000)  
Net cash provided by financing activities       7,213,000 190,493,000  
Net (decrease) increase in cash, cash equivalents, and restricted cash       (102,429,000) 60,059,000  
Cash, cash equivalents, and restricted cash at beginning of period   $ 182,633,000   182,633,000 328,311,000 $ 328,311,000
Cash, cash equivalents, and restricted cash at end of period 80,204,000   388,370,000 80,204,000 388,370,000 182,633,000
Cash and cash equivalents at end of period 77,982,000   385,648,000 77,982,000 385,648,000 179,911,000
Restricted cash at end of period 2,222,000   2,722,000 2,222,000 2,722,000  
Cash, cash equivalents, and restricted cash at end of period $ 80,204,000   $ 388,370,000 $ 80,204,000 $ 388,370,000 $ 182,633,000