Unaudited Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (14,760)	$ (17,459)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	532	453
Stock-based compensation	5,625	5,473
Accretion of discounts on investments, net	(1,787)	(1,678)
Changes in operating assets and liabilities:
Accounts receivable	(519)	(750)
Prepaid expenses and other current assets	(1,171)	1,649
Other long-term assets	(15)	(221)
Accounts payable	(456)	(107)
Accrued expenses	(1,573)	(560)
Deferred revenue	(733)	(1,298)
Operating lease right-of-use assets and liabilities, net	20	587
Net cash used in operating activities	(14,837)	(13,911)
Cash flows from investing activities
Purchases of property and equipment	(197)	(285)
Purchases of short-term investments	(178,539)	(71,705)
Maturities of short-term investments	65,000	63,250
Net cash used in investing activities	(113,736)	(8,740)
Cash flows from financing activities
Proceeds from exercise of common stock options	1,657	1,580
Proceeds from the issuance of common stock and pre-funded common stock warrants, net of issuance costs	320,514	0
Net cash provided by financing activities	322,171	1,580
Net increase (decrease) in cash, cash equivalents and restricted cash	193,598	(21,071)
Cash, cash equivalents and restricted cash - beginning of year	20,021	52,242
Cash, cash equivalents and restricted cash - end of period	213,619	31,171
Supplemental disclosure of noncash investing and financing activities
Unpaid property and equipment	0	395
Unpaid equity issuance costs	438	0
Vesting of restricted common stock	5	134
Unrealized gain (loss) on available-for-sale securities, net	$ (1,189)	$ 796