Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 39,257	$ 90,672
Short-term investments	411,001	427,288
Prepaid expenses and other current assets	9,528	4,329
Total current assets	459,786	522,289
Property and equipment, net	2,546	2,673
Restricted cash	210	210
Operating lease right-of-use assets	4,719	5,573
Other long-term assets	4,164	3,306
Total assets	471,425	534,051
Current liabilities:
Accounts payable and accrued expenses	15,583	20,192
Current operating lease liabilities	2,290	2,263
Total current liabilities	17,873	22,455
Long-term operating lease liabilities	3,602	4,612
Other long-term liabilities	459	375
Total liabilities	21,934	27,442
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000 shares authorized; no shares issued and outstanding
Common stock, $0.0001 par value; 200,000 shares authorized; 66,838 and 66,572 shares issued and outstanding as of June 30, 2022 and December 31, 2021, respectively	7	7
Additional paid-in capital	957,489	941,359
Accumulated other comprehensive income (loss)	(7,815)	(1,789)
Accumulated deficit	(500,190)	(432,968)
Total stockholders' equity	449,491	506,609
Total liabilities and stockholders' equity	$ 471,425	$ 534,051