Condensed Balance Sheets - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash	$ 59,829,000	$ 39,766,000
Prepaid expenses and other current assets	2,986,000	3,128,000
Total current assets	62,815,000	42,894,000
Property and equipment, net	1,226,000	1,531,000
Restricted cash	100,000	100,000
Total assets	64,141,000	44,525,000
Current liabilities:
Accounts payable	1,790,000	1,187,000
Accrued expenses and other current liabilities	1,687,000	1,372,000
Equipment loan payable	44,000	113,000
Current portion of long-term debt		366,000
Total current liabilities	3,521,000	3,038,000
Long-term debt, net of current portion		134,000
Deferred rent	3,000	8,000
Total liabilities	3,524,000	3,180,000
Commitments and contingencies (Note 7)
Stockholders' equity:
Common stock, $0.0001 par value; 200,000,000 shares authorized at June 30, 2021 and December 31, 2020; 11,812,792 shares issued and outstanding at June 30, 2021; 10,634,245 shares issued and outstanding at December 31, 2020	1,000	1,000
Additional paid-in capital	124,149,000	95,738,000
Accumulated deficit	(63,533,000)	(54,394,000)
Total stockholders' equity	60,617,000	41,345,000
Total liabilities and stockholders' equity	$ 64,141,000	$ 44,525,000