Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 277,883	$ 277,544
Accounts receivable--related party	0	185
Prepaid expenses and other current assets	3,649	4,709
Total current assets	281,532	282,438
Property and equipment, net	17,736	14,643
Operating lease right-of-use asset	19,713	20,358
Goodwill	19,462	19,462
Restricted cash	150	150
Other non-current assets	1,858	1,887
Total assets	340,451	338,938
Current liabilities:
Accounts payable	3,465	3,263
Contract liabilities — related party, current	0	4,805
Accrued and other current liabilities	5,203	6,682
Operating lease liability	1,733	1,567
Total current liabilities	10,401	16,317
Operating lease liability, net of current portion	18,851	19,377
Other non-current liabilities	115	115
Total liabilities	29,367	35,809
Stockholders’ equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized as of March 31, 2022 and December 31, 2021, respectively; none issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	0	0
Common stock, $0.0001 par value, 150,000,000 shares authorized as of March 31, 2022 and December 31, 2021, respectively; 39,885,816 and 39,736,914 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	4	4
Additional paid-in capital	474,786	471,449
Accumulated deficit	(163,706)	(168,324)
Accumulated other comprehensive income	0	0
Total stockholders’ equity	311,084	303,129
Total liabilities and stockholders’ equity	$ 340,451	$ 338,938