Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 33,755	$ 45,747
Collaboration revenue receivable	5,000
Prepaid expenses and other current assets	1,800	2,171
Total current assets	40,555	47,918
Property and equipment, net	4,275	4,503
Operating lease right-of-use assets	1,109	1,355
Restricted cash	329	329
Other assets	1,077	762
Total assets	47,345	54,867
Current liabilities:
Accounts payable	2,408	3,125
Accrued expenses and other current liabilities	4,237	4,258
Operating lease liabilities	1,097	1,074
Deferred revenue	10,060	9,789
Total current liabilities	17,802	18,246
Operating lease liabilities, net of current portion	99	379
Deferred revenue, net of current portion	1,288	1,926
Total liabilities	19,189	20,551
Commitments and contingencies (Note 8)
Stockholders’ equity:
Common stock, $0.001 par value; 200,000,000 shares authorized at March 31, 2022 and December 31, 2021; 13,009,896 and 13,007,178 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	13	13
Additional paid-in capital	228,552	227,700
Accumulated deficit	(200,409)	(193,397)
Total stockholders’ equity	28,156	34,316
Total liabilities and stockholders’ equity	$ 47,345	$ 54,867