CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities:
Net loss	$ (197,536,000)	$ (140,305,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Impairment of goodwill and indefinite-lived intangible assets	89,485,000	0
Impairment of long-lived assets	65,232,000	0
Depreciation and amortization	13,238,000	8,765,000
Accretion of discounts and impairment on marketable securities	(2,031,000)	(324,000)
Amortization in operating lease right-of-use assets	5,945,000	6,357,000
Deferred income tax benefit	(6,195,000)	0
Stock-based compensation	21,256,000	23,402,000
Other non-cash adjustments	1,119,000	0
Net changes in operating assets and liabilities:
Interest receivable	192,000	(175,000)
Accounts receivable	2,530,000	1,491,000
Prepaid expenses and other assets	5,159,000	(5,848,000)
Accounts payable and other accrued liabilities	(5,220,000)	9,443,000
Accrued compensation and employee benefits	(4,182,000)	(1,225,000)
Deferred revenues	(159,671,000)	(64,956,000)
Lease liabilities	(3,737,000)	(3,298,000)
Other non-current liabilities	112,000	95,000
Net cash used in operating activities	(174,304,000)	(166,578,000)
Investing Activities:
Purchases of marketable securities	(59,551,000)	(225,621,000)
Maturities of marketable securities	193,858,000	254,990,000
Purchases of property and equipment	(18,484,000)	(12,697,000)
Net cash provided by investing activities	115,823,000	16,672,000
Financing Activities:
Taxes paid related to net share settlement of equity awards	(1,404,000)	(1,962,000)
Proceeds from exercise of stock options	0	124,000
Net cash provided by financing activities	14,421,000	65,125,000
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	130,000	479,000
Net decrease in cash, cash equivalents, and restricted cash	(43,930,000)	(84,302,000)
Cash, cash equivalents, and restricted cash, beginning of period	101,944,000	180,372,000
Cash, cash equivalents, and restricted cash, end of period	58,014,000	96,070,000
Supplemental cash flow disclosures:
Property and equipment included in unpaid liabilities	2,757,000	3,927,000
Tenant improvement allowance included in contra-lease liability	0	1,531,000
At the Market Offering
Financing Activities:
Proceeds from at-the-market offering/ issuance of common stock	15,106,000	65,848,000
Employee Stock
Financing Activities:
Proceeds from at-the-market offering/ issuance of common stock	$ 719,000	$ 1,115,000