Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 112,146	$ 240,420
Marketable securities, short-term	227,778	135,412
Accounts receivable	524	1,153
Contract assets	2,093	1,488
Other receivables	3,094	5,483
Prepaid expenses and other current assets	7,293	7,236
Total current assets	352,928	391,192
NON-CURRENT ASSETS
Investments in equity securities	7,728	7,626
Marketable securities, long-term	26,152	37,676
Property and equipment, net	8,006	4,887
Operating lease, right of use assets	25,250	0
Other assets	1,303	975
TOTAL ASSETS	421,367	442,356
CURRENT LIABILITIES
Accounts payable	426	3,990
Accrued expenses and other current liabilities	14,910	13,136
Lease liabilities	877	0
Deferred revenue ($150 and $0 from related party, respectively)	12,642	8,703
Total current liabilities	28,855	25,829
LONG-TERM LIABILITIES
Deferred revenue, net of current portion ($0 and $100 from related party, respectively)	15,626	22,032
Deferred rent and lease incentive liability	0	2,097
MSKCC success payments liability	1,432	4,080
Lease liabilities, non-current	27,090	0
Other liabilities	0	17
Deferred tax liabilities	475	476
Total liabilities	73,478	54,531
COMMITMENTS AND CONTINGENCIES (Note 9)
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.0001 per share, 10,000,000 shares authorized at June 30, 2022 and December 31, 2021; no shares issued and outstanding as of June 30, 2022 and December 31, 2021, respectively	0	0
Common stock, par value $0.0001 per share, 300,000,000 shares authorized at June 30, 2022 and December 31, 2021, respectively; 60,838,370 and 60,263,158 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	6	6
Additional paid-in-capital	493,043	485,748
Accumulated other comprehensive loss	(1,581)	(135)
Accumulated deficit	(143,579)	(97,794)
Total stockholders' equity	347,889	387,825
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 421,367	$ 442,356