Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net loss	$ (49,082)	$ (7,826)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	636	431
Loss on disposal of property and equipment	4	0
Change in fair value of derivative liability	0	728
Change in fair value of profits interest liability	0	(7,601)
Loss on extinguishment of debt	0	174
Stock-based compensation	16,941	0
Non-cash interest	0	489
Accrued interest	3	813
Deferred rent	(111)	(51)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(2,646)	389
Accounts payable and accrued expenses	5,716	5,867
Deferred revenue	0	(279)
Net cash used in operating activities	(28,539)	(6,866)
Cash flows from investing activities
Purchases of property and equipment	(736)	(86)
Net cash used in investing activities	(736)	(86)
Cash flows from financing activities
Proceeds from issuance of convertible debt	0	2,750
Proceeds from issuance of PPP loan	0	682
Payment of initial public offering costs	(1,911)	0
Proceeds from issuance of common stock under Employee Stock Purchase Plan	190	0
Net cash provided by (used in) financing activities	(1,721)	3,432
Net decrease in cash and cash equivalents	(30,996)	(3,520)
Cash and cash equivalents, beginning of period	238,605	3,704
Cash and cash equivalents, end of period	207,609	184
Supplemental disclosure of non-cash investing and financing activities
Unpaid deferred financing costs	0	95
Property and equipment additions included in accounts payable and accrued expenses	$ 42	$ 89