Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 49,170	$ 54,951
Marketable securities, available-for-sale	201,730	283,554
Accounts receivable from government grants, net	5	417
Prepaid expenses and other current assets	8,301	6,182
Restricted Cash, Current	243	0
Total current assets	259,449	345,104
Property and equipment, net	2,251	1,099
Operating lease right-of-use assets	1,195	2,520
Prepaid expenses and other assets	4,794	2,976
Deferred financing costs	716	0
Goodwill	3,736	3,736
In-process research and development	8,800	8,800
Restricted cash	3,021	1,320
Total assets	283,962	365,555
Current liabilities
Accounts payable	8,273	8,661
Accrued expenses	25,304	19,940
Total current liabilities	33,577	28,601
Deferred tax liability	2,480	2,480
Other long-term liabilities	296	1,097
Total liabilities	36,353	32,178
Commitments and contingencies
EQUITY
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued and outstanding at June 30, 2021 and December 31, 2020	0	0
Common stock, $0.001 par value; 250,000,000 shares authorized; 41,314,864 and 41,040,286 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	41	41
Additional paid-in capital	529,019	509,339
Accumulated other comprehensive income	94	36
Accumulated deficit	(305,309)	(200,834)
Total stockholders’ equity	223,845	308,582
Noncontrolling interests	23,764	24,795
Total equity	247,609	333,377
Total liabilities and stockholders’ equity	$ 283,962	$ 365,555