Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 181,724	$ 187,750
Marketable securities	105,113	59,622
Accounts receivable	10,061	262
Prepaid expenses and other current assets	3,741	6,447
Total current assets	300,639	254,081
Marketable securities	68,215	3,000
Property and equipment, net	18,935	20,626
Restricted cash	2,074	1,750
Operating lease right-of-use assets	55,385	55,673
Investment in equity securities	41,200
Equity method investment	8,205
Intangible assets, net	26,009	27,696
In-process research & development	36,550	39,295
Goodwill	117	22,441
Other assets	6,474	4,440
Total assets	563,803	429,002
Current liabilities:
Accounts payable	8,580	3,995
Accrued and other current liabilities	17,104	15,674
Operating lease liabilities	4,401	3,045
Contingent value rights liability	10,000
Deferred revenue		95
Total current liabilities	40,085	22,809
Contingent value rights liability - non-current	24,591	13,780
Contingent consideration liability	5,160	1,800
Deferred tax liabilities	735	16,377
Operating lease liabilities, net of current maturities	39,589	38,709
Other long-term liabilities		905
Total liabilities	110,160	94,380
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 10,000 shares authorized as of December 31, 2021 and 2020; no shares issued and outstanding as of December 31, 2021 and 2020
Common stock, $0.0001 par value; 300,000 shares authorized as of December 31, 2021 and 2020; 54,761 and 42,282 shares issued and outstanding as of December 31, 2021 and 2020, respectively	5	4
Additional paid-in capital	685,459	463,436
Accumulated deficit	(231,766)	(128,829)
Accumulated other comprehensive income (loss)	(55)	11
Total stockholders’ equity	453,643	334,622
Total liabilities and stockholders’ equity	$ 563,803	$ 429,002