Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 39,766	$ 2,543
Prepaid expenses and other current assets	3,128	579
Total current assets	42,894	3,122
Property and equipment, net	1,531	1,700
Restricted cash	100	100
Other assets		138
Total assets	44,525	5,060
Current liabilities:
Current portion of capital lease obligations		239
Current portion of long-term debt	366
Current portion of equipment loan payable	113	212
Accounts payable	1,187	548
Accrued expenses and other current liabilities	1,372	666
Total current liabilities	3,038	1,665
Equipment loan payable, net of current portion		113
Long-term debt, net of current portion	134
Deferred rent	8	18
Total liabilities	3,180	1,796
Commitments and contingencies (Note 10)
Series A convertible preferred stock, $0.0001 par value; No shares authorized, issued or outstanding at December 31, 2020; 30,000,000 shares authorized and 4,443,259 shares issued and outstanding at December 31, 2019 (liquidation value of $39,990 at December 31, 2019)		38,894
Stockholders' equity (deficit):
Common stock, $0.0001 par value; 200,000,000 and 50,000,000 shares authorized at December 31, 2020 and 2019, respectively; 10,634,245 shares issued and outstanding at December 31, 2020 and 1,099,270 shares issued and outstanding at December 31, 2019	1
Additional paid-in capital	95,738	927
Accumulated deficit	(54,394)	(36,557)
Total stockholders' equity (deficit)	41,345	(35,630)
Total liabilities, convertible preferred stock, and stockholders' equity (deficit)	$ 44,525	$ 5,060