Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 28,109	$ 40,456
Marketable securities	208,480	236,105
Prepaid expenses	5,982	8,241
Other current assets	933	920
Total current assets	243,504	285,722
Property and equipment, net	4,666	3,431
Operating lease right-of-use asset	8,647	9,741
Other assets	6,562	674
Total assets	263,379	299,568
Current liabilities:
Accounts payable	2,492	2,479
Accrued and other current liabilities	8,463	5,953
Operating lease liabilities, current	2,782	2,565
Total current liabilities	13,737	10,997
Operating lease liabilities, noncurrent	7,413	8,865
Long-term debt	9,952	9,834
Total liabilities	31,102	29,696
Stockholders' equity:
Common stock, $0.001 par value, 250,000,000 and 125,000,000 shares authorized as of June 30,2023 (unaudited) and December 31, 2022; respectively; 72,532,814 and 68,493,429 shares issued and outstanding as of June 30, 2023 (unaudited) and December 31, 2022,respectively	73	68
Preferred stock, $0.001 par value, 10,000,000 shares authorized, zero shares issued and outstanding as of June 30, 2023 (unaudited) and December 31, 2022	0	0
Additional paid-in capital	528,434	519,620
Accumulated other comprehensive loss	(830)	(923)
Accumulated deficit	(295,400)	(248,893)
Total stockholders' equity	232,277	269,872
Total liabilities and stockholders' equity	$ 263,379	$ 299,568