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	$ (24,789)	$ (3,248)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	2,385	756
Depreciation and amortization	263	375
Gain on sale of priority review voucher	0	(6,300)
Loss on sale or disposal of fixed assets	14	0
Amortization of ROU asset and change in operating lease liability	(69)	0
In-process research and development charge	0	426
Benefit for deferred taxes	0	(4,848)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,334)	(495)
Other receivables	148	224
Accounts payable and accrued expenses	(438)	(2,907)
Net cash used in operating activities	(23,820)	(16,017)
Cash Flows From Investing Activities
Cash acquired in connection with merger	0	84,179
Installment from sale of priority review voucher	26,000	32,500
Purchase of equipment	(17)	(18)
Net cash provided by investing activities	25,983	116,661
Cash Flows From Financing Activities
Exercise of stock options	64	0
Payment for tax withholding on vested awards	(114)	0
Principal payments on notes payable	0	(27)
Sales of shares under stock purchase plan	6	6
Costs of common stock offering under Controlled Equity Offering	(148)	0
Net cash used in financing activities	(192)	(21)
Net increase in cash and cash equivalents	1,971	100,623
Cash and cash equivalents at beginning of period	98,679	4,952
Cash and cash equivalents at end of period	$ 100,650	$ 105,575