CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net loss	$ (18,019)	$ (7,077)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	76	44
Non-cash interest expense	19	20
Non-cash lease expense	179	68
Stock-based compensation expense	3,299	833
Changes in assets and liabilities:
Prepaid expenses and other assets	(575)	493
Accounts payable and accrued expenses	131	405
Lease obligations	(176)	(69)
Net cash used in operating activities	(15,066)	(5,283)
Cash flows from investing activities
Purchase of property and equipment	(223)	(261)
Net cash used in investing activities	(223)	(261)
Cash flows from financing activities
Proceeds from issuance of common stock	50,177	28,125
Payment of equity issuance costs	(75)	(1,822)
Financing lease principal payments	0	(6)
Net cash provided by financing activities	50,102	26,297
Net increase in cash, cash equivalents, and restricted cash	34,813	20,753
Cash, cash equivalents, and restricted cash at beginning of period	95,109	24,190
Cash, cash equivalents, and restricted cash at end of period	129,922	44,943
Supplemental disclosure of non-cash investing and financing transactions:
Series B Convertible Preferred Stock issuance	0	4,988
Purchase of property and equipment	611	44
Right-of-use asset related to operating leases	0	926
Equity issuance costs	$ 71	$ 108