Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 103,500	$ 181,724
Marketable securities	172,599	105,113
Accounts receivable	2,947	10,061
Prepaid expenses and other current assets	6,727	3,741
Total current assets	285,773	300,639
Marketable securities	53,933	68,215
Property and equipment, net	18,263	18,935
Restricted cash	2,074	2,074
Operating lease right-of-use assets	53,922	55,385
Investment in equity securities	41,200	41,200
Equity method investment	7,201	8,205
Intangible assets, net	25,580	26,009
In-process research & development	36,550	36,550
Goodwill	117	117
Other assets	6,657	6,474
Total assets	531,270	563,803
Current liabilities:
Accounts payable	9,039	8,580
Accrued and other current liabilities	12,946	17,104
Operating lease liabilities	4,581	4,401
Contingent value rights liability	10,000	10,000
Total current liabilities	36,566	40,085
Contingent value rights liability - non-current	23,963	24,591
Contingent consideration liability	4,750	5,160
Deferred tax liabilities	735	735
Operating lease liabilities, net of current maturities	38,461	39,589
Total liabilities	104,475	110,160
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 10,000 shares authorized as of March 31, 2022 and December 31, 2021; no shares issued and outstanding at March 31, 2022 and December 31, 2021
Common stock, $0.0001 par value; 300,000 shares authorized as of March 31, 2022 and December 31, 2021; 55,117 and 54,761 shares issued and outstanding at March 31, 2022 and December 31, 2021	6	5
Additional paid-in capital	691,776	685,459
Accumulated deficit	(263,450)	(231,766)
Accumulated other comprehensive loss	(1,537)	(55)
Total stockholders’ equity	426,795	453,643
Total liabilities and stockholders’ equity	$ 531,270	$ 563,803