Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (18,213)	$ (3,716)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,237	750
Depreciation	131	21
Amortization of intangible assets	90
Gain on sale of property and equipment		(346)
Changes in operating assets and liabilities:
Prepaid and other assets	(10,102)	(729)
Operating lease right-of-use assets and liabilities	30
Accounts payable	1,434	12
Accrued development expense	2,532	(219)
Accrued compensation and benefits	43	22
Other current liabilities	609	(2)
Net cash used in operating activities	(22,209)	(4,207)
Cash flows from investing activities:
Purchases of property and equipment	(22,114)
Proceeds from sale of property and equipment		360
Net cash (used in) provided by investing activities	(22,114)	360
Cash flows from financing activities:
Proceeds from issuance of common stock upon exercise of stock options	1,824	256
Proceeds from issuance of common stock upon exercise of common stock warrants	692	4,584
Proceeds from registered direct offering, net of issuance costs	189,825
Net cash provided by financing activities	192,341	4,840
Net increase in cash and cash equivalents	148,018	993
Cash and cash equivalents at beginning of period	93,506	23,081
Cash and cash equivalents at end of period	$ 241,524	$ 24,074