Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 816,460	$ 850,117
Accounts receivable	50,000
Unbilled other receivable		5,815
Prepaid expenses and other current assets	4,650	7,545
Total current assets	871,110	863,477
Property and equipment, net	33	48
Other assets	400	107
Total assets	871,543	863,632
Current liabilities
Accounts payable	10,701	60
Accrued expenses and other current liabilities	37,961	14,368
Deferred revenue	224,991	301,367
Total current liabilities	273,653	315,795
Other liabilities	29	36
Total liabilities	273,682	315,831
Commitments and contingencies (see Note 11)
Stockholders’ equity:
Preferred stock, $0.001 par value per share; 10,000,000 shares authorized; no shares issued and outstanding as of June 30, 2021 and December 31, 2020
Common stock, $0.001 par value; 300,000,000 shares authorized as of June 30, 2021 and December 31, 2020; 82,776,937 and 82,436,937 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	83	82
Additional paid-in capital	630,686	612,879
Accumulated deficit	(32,908)	(65,160)
Total stockholders’ equity	597,861	547,801
Total liabilities and stockholders’ equity	$ 871,543	$ 863,632