Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 34,946	$ 144,514
Marketable securities	151,663	0
Prepaid expenses and other current assets	8,182	2,591
Total current assets	194,791	147,105
Property and equipment, net	1,567	2,243
Operating lease, right-of-use ("ROU") asset	2,967	4,089
Other assets	320	320
Total assets	199,645	153,757
Current liabilities:
Accounts payable	3,382	867
Accrued expenses	11,690	8,775
Operating lease obligations, current portion	1,097	989
Total current liabilities	16,169	10,631
Operating lease obligations, net of long-term portion	1,838	3,048
Total liabilities	18,007	13,679
Commitments and Contingencies (Note 11)
Stockholders' equity:
Common stock, $0.0001 par value: 300,000 shares authorized; 126,495 and 101,303 shares issued at December 31, 2022 and 2021, respectively; 126,302 and 100,832 shares outstanding at December 31, 2022 and 2021, respectively	13	10
Additional paid-in-capital	454,741	373,657
Accumulated other comprehensive loss	(302)	0
Accumulated deficit	(272,814)	(233,589)
Total stockholders' equity	181,638	140,078
Total liabilities and stockholders' equity	$ 199,645	$ 153,757