CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income/(loss)		$ 1,419	$ (5,163)
Adjustments to reconcile net income/(loss) to net cash used in operating activities:
Depreciation and amortization		15	16
Equity-based compensation expense		3,508
Amortization or accretion on marketable securities		229	25
Changes in operating assets and liabilities:
Prepaid expenses and other current assets		(4,352)	693
Accounts payable		(4,124)	170
Accrued expenses and other current liabilities		1,790	(756)
Net cash used in operating activities		(1,515)	(5,015)
Investing activities:
Purchases of property and equipment			(3)
Purchase of available-for-sale securities		(149,763)	(31,087)
Proceeds from sales and maturities of investments		12,037	4,200
Net cash used in investing activities		(137,726)	(26,890)
Financing activities:
Proceeds from issuance of common stock equivalents	[1]		14,250
Proceeds from initial public offering		267,268
Payment of issuance costs related to common stock equivalents	[1]		(213)
Payment of deferred offering costs		(2,688)
Net cash provided by financing activities		264,580	14,037
Net (decrease)/increase in cash and cash equivalents		125,339	(17,868)
Cash and cash equivalents at beginning of period		168,198	63,250
Cash and cash equivalents at end of period		293,537	$ 45,382
Noncash financing activities
Deferred offering costs paid in the prior year		$ 65

[1] Changes in equity activities for the three months ending March 31, 2020 were retroactively adjusted, including shares and per share amounts, as a result of the Reorganization and Reverse Stock Split. See Note 3 to the consolidated financial statements for additional details.