Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net loss	$ (88,401)	$ (8,653)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on forgiveness of PPP Loan	(257)	0
Acquired in-process research and development	84,478	0
Share-based compensation expense	2,030	155
Depreciation and amortization	67	4
Change in fair value of preferred stock warrant liability	290	0
Change in operating assets and liabilities:
Prepaid expenses and other assets	(1,747)	(30)
Other assets	601	(8)
Accounts payable	587	961
Accrued liabilities	(1,699)	313
Lease liabilities, net	9	0
Net cash used in operating activities	(4,042)	(7,258)
Investing activities
Purchase of property and equipment	(5)	(50)
Cash acquired in connection with the Merger	17,143	0
Net cash provided by (used in) investing activities	17,138	(50)
Financing activities
Proceeds from debt, net of issuance costs	0	254
Issuance of common stock, net of issuance costs	62,319	0
Exercise of warrants and stock options to purchase common stock	217	10
Net cash provided by financing activities	62,536	264
Net increase (decrease) in cash and cash equivalents	75,632	(7,044)
Cash and cash equivalents at beginning of period	47,089	18,218
Cash and cash equivalents at end of period	122,721	11,174
Supplemental disclosure of cash flow information
Interest paid	142	0
Noncash financing activities
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	0	667
Warrant liability reclassification to equity	396	0
Issuance of convertible preferred stock upon merger	5,452	0
Conversion of convertible preferred stock into common stock upon Merger	83,302	0
Issuance of common stock upon Merger	$ 97,982	$ 0