Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 40,153	$ 35,412
Marketable securities	128,820	182,750
Accounts receivable	357	2,500
Unbilled accounts receivable	743	1,137
Prepaid expenses and other current assets	4,174	4,199
Total current assets	174,247	225,998
Property and equipment, net	7,834	7,368
Operating lease right-of-use assets	9,954	0
Restricted cash	1,092	1,092
Other assets	2,106	542
Total assets	195,233	235,000
Current liabilities:
Accounts payable	5,385	4,788
Accrued expenses and other current liabilities	12,470	9,231
Deferred revenue, current portion	1,782	4,711
Operating Lease Liability, current	2,484	0
Deferred lease incentive, current portion	0	469
Total current liabilities	22,121	19,199
Operating lease liability, excluding current portion	12,160	0
Other liabilities, excluding current portion	197
Deferred rent, excluding current portion		1,680
Deferred lease incentive, excluding current portion	0	2,582
Total liabilities	34,478	23,461
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value; 200,000,000 shares authorized; 41,008,205 and 40,636,398 shares issued as of June 30, 2022 and December 31, 2021, respectively; 41,008,205 and 40,626,224 shares outstanding as of June 30, 2022 and December 31, 2021, respectively	41	41
Treasury stock, at cost; no shares	0	0
Additional paid-in capital	524,247	514,362
Accumulated other comprehensive loss	(1,068)	(397)
Accumulated deficit	(362,465)	(302,467)
Total stockholders’ equity	160,755	211,539
Total liabilities and stockholders’ equity	$ 195,233	$ 235,000