Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (30,135)	$ (15,915)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	3,093	753
Amortization of premium and discounts on available-for-sale investments	(200)	92
Depreciation and amortization	2	4
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	1,332	(345)
Other long-term assets	28	293
Accounts payable	(875)	585
Accrued expenses and other current liabilities	(531)	286
Net cash used in operating activities	(27,286)	(14,247)
Cash flows from investing activities:
Purchases of available-for-sale investments	(90,799)	(33,701)
Proceeds from maturities of available-for-sale investments	129,160	36,177
Net cash provided by investing activities	38,361	2,476
Cash flows from financing activities:
Proceeds from exercise of stock options	471	107
Payment of deferred offering costs		(1,009)
Net cash provided by (used in) financing activities	471	(902)
Net increase (decrease) in cash and cash equivalents	11,546	(12,673)
Cash and cash equivalents at beginning of period	11,226	19,266
Cash and cash equivalents at end of period	22,772	6,593
Supplemental disclosure of cash information:
Cash paid for taxes	262	39
Supplemental disclosure of non-cash information:
Deferred financing costs included in accrued and other current liabilities	$ 87	$ 419