Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (65,561)	$ (28,277)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	166	31
Stock-based compensation expense	8,709	4,371
Amortization of operating leases, right-of-use assets	1,064	900
Change in fair value of CVR liability		(343)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(909)	(523)
Other assets	(1,168)	(1,970)
Accounts payable	9	1,260
Accrued expenses and other current liabilities	3,173	1,666
Operating lease liability	(273)	(992)
Net cash used in operating activities	(54,790)	(23,877)
Cash flows from investing activities:
Purchases of property and equipment	(1,585)	(123)
Net cash used in investing activities	(1,585)	(123)
Cash flows from financing activities:
Proceeds from issuance of shares of common stock and pre-funded warrants, net of offering costs of $10.8 million	162,115
Proceeds from issuance of stock from employee stock purchase plan	129
Proceeds from issuance of common stock upon stock option exercises	9
Payment to CVR Holders		(85)
Net cash (used in) provided by financing activities	162,253	(85)
Net (decrease) increase in cash, cash equivalents and restricted cash	105,878	(24,085)
Cash, cash equivalents and restricted cash at beginning of period	220,939	243,445
Cash, cash equivalents and restricted cash at end of period	326,817	219,360
Supplemental disclosure of cash flow information:
Right-of-use assets obtained in exchange for new operating lease liabilities	25,184
Supplemental disclosure of noncash investing and financing information:
Offering costs included in accounts payable and accrued expenses	200
Property & equipment included in accounts payable and accrued expenses	466
Conversion of Series A Convertible Preferred stock into common shares	$ 14,000	25,481
Issuance of shares in partial settlement of CVR liability		$ 2,043