Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		15 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (19,531)	$ (16,103)
Adjustments to reconcile net loss to net cash used in operating activities
Amortization of investment premiums	(389)	670
Amortization of financing costs	28	12
Stock-based compensation	3,569	2,357
Amortization of right-of-use assets	72	77
Interest expense related to operating lease liability	12	4
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(2,258)	23
Accrued interest, net of interest received on maturity of investments	243	105
Accounts payable	(4,732)	1,707
Accrued expenses	(1,572)	694
Lease liability	(85)	(76)
Net cash used in operating activities	(24,643)	(10,530)
Cash flows from investing activities
Purchases of investments	(57,395)	(30,682)
Proceeds from sales and maturities of investments	59,593	32,301
Net cash provided by investing activities	2,198	1,619
Cash flows from financing activities
Public offering and financing costs	(37)
Value of shares withheld related to employee tax withholding	(1,714)	(499)
Repurchase of common stock		(5,121)
Proceeds from warrant and option exercises and stock issuances under employee stock purchase plan	3,966	614
ATM offering, net of fees	1,969
Net cash provided by financing activities	4,184	(5,006)
Net decrease in cash and cash equivalents	(18,261)	(13,917)
Cash and cash equivalents beginning of period	36,632	26,371	$ 26,371
Effect of exchange rate changes on cash	(9)
Cash and cash equivalents end of period	18,362	12,454	$ 18,362
Supplemental disclosure of non-cash investing and financing transactions
Unpaid deferred public offering and other financing costs	$ 52	50
Right-of-use asset obtained in exchange for lease obligation		$ 1,664