Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 15,835	$ 36,326
Short-term marketable securities	77,315	31,910
Prepaid expenses and other current assets	6,698	5,550
Total current assets	99,848	73,786
Property and equipment, net	6,792	6,473
Long-term marketable securities	2,620
Other non-current assets	572	774
Total assets	109,832	81,033
Liabilities
Accounts payable	1,469	3,381
Accrued and other current liabilities	5,943	2,675
Current portion of long-term debt	1,080	1,990
Total current liabilities	8,492	8,046
Long-term debt		1,042
Other noncurrent liabilities		9
Total liabilities	8,492	9,097
Commitments and Contingencies (Note 5)
Stockholders’ equity
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of December 31, 2021 and December 31, 2020; no shares issued and outstanding as of December 31, 2021 and December 31, 2020
Common stock, $0.0001 par value, 300,000,000 shares authorized as of December 31, 2021 and December 31, 2020, respectively; 31,545,564 shares and 17,436,978 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	3	2
Additional paid-in-capital	243,115	162,469
Accumulated other comprehensive (loss) income	(42)	29
Accumulated deficit	(141,736)	(90,564)
Total stockholders’ equity	101,340	71,936
Total liabilities, preferred stock and stockholders' equity	$ 109,832	$ 81,033