CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 90,042	$ 119,801
Marketable securities	91,575	87,668
Prepaid expenses	6,474	4,836
Other current assets	2,212	2,094
Total current assets	190,303	214,399
Restricted cash equivalents	2,413	2,413
Property and equipment, net	11,767	6,853
Operating lease right-of-use assets	21,597	15,670
Other assets	8,189	3,255
Total assets	234,269	242,590
Current liabilities:
Accounts payable	1,255	1,545
Accrued liabilities	9,258	6,335
Operating lease liability	7,281	1,839
Other current liabilities	351	434
Total current liabilities	18,145	10,153
Long-term liabilities:
Operating lease liabilities—non-current	21,677	16,174
Total liabilities	39,822	26,327
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of March 31, 2022 and December 31, 2021; 0 shares issued and outstanding as of March 31, 2022 and December 31, 2021
Common stock, $0.0001 par value; 400,000,000 shares authorized as of March 31, 2022 and December 31, 2021; 37,501,662 and 37,375,428 shares issued and 37,336,314 and 37,174,741 outstanding as of March 31, 2022 and December 31, 2021, respectively	4	4
Additional paid-in capital	348,375	346,382
Accumulated other comprehensive loss	(1,072)
Accumulated deficit	(152,860)	(130,123)
Total stockholders' equity	194,447	216,263
Total liabilities and stockholders' equity	$ 234,269	$ 242,590