Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 108,522	$ 187,750
Marketable securities	75,513	59,622
Accounts receivable	11	262
Prepaid expenses and other current assets	2,496	6,447
Total current assets	186,542	254,081
Marketable securities	20,739	3,000
Property and equipment, net	19,327	20,626
Restricted cash	2,074	1,750
Operating lease right-of-use assets	56,948	55,673
Equity method investment	9,888
Intangible assets, net	26,432	27,696
In-process research & development	36,550	39,295
Goodwill	18,541	22,441
Other assets	6,243	4,440
Total assets	383,284	429,002
Current liabilities:
Accounts payable	5,511	3,995
Accrued and other current liabilities	13,867	15,674
Operating lease liabilities	4,194	3,045
Deferred revenue		95
Total current liabilities	23,572	22,809
Contingent value rights liability	29,327	13,780
Contingent consideration liability	4,670	1,800
Deferred tax liabilities	15,172	16,377
Operating lease liabilities, net of current maturities	40,763	38,709
Other long-term liabilities		905
Total liabilities	113,504	94,380
Commitments and contingencies (Note 10)
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value; 10,000 shares authorized as of September 30, 2021 and December 31, 2020; no shares issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, $0.0001 par value; 300,000 shares authorized as of September 30, 2021 and December 31, 2020; 44,830 and 42,282 shares issued and outstanding at September 30, 2021 and December 31, 2020	4	4
Additional paid-in capital	508,714	463,436
Accumulated deficit	(239,311)	(128,829)
Accumulated other comprehensive income	373	11
Total stockholders’ equity	269,780	334,622
Total liabilities and stockholders’ equity	$ 383,284	$ 429,002