Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 65,599	$ 55,904
Investments	170,063	317,271
Prepaid expenses and other current assets	6,092	5,047
Total current assets	241,754	378,222
Property and equipment, net	38,514	39,172
Goodwill	39,154	39,154
Intangible assets	25,150	25,150
Restricted cash	1,362	1,372
Deposits	503	533
Investments	0	34,320
Operating lease right-of-use assets, net	4,349	3,901
Finance lease right-of-use asset, net	42,902	44,517
Total assets	393,688	566,341
Current liabilities:
Accounts payable and accrued expenses	37,133	45,789
Operating lease liabilities, current	1,005	925
Finance lease liability, current	1,842	1,791
Total current liabilities	39,980	48,505
Operating lease liabilities, non-current	3,413	2,973
Finance lease liability, non-current	19,382	19,353
Other liabilities	1,142	2,936
Total liabilities	63,917	73,767
Commitments and contingencies (Note 13)
Stockholders' equity:
Common stock, $0.01 par value, 180,000,000 shares authorized; 91,116,692 and 90,282,267 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively	911	903
Additional paid-in capital	1,486,436	1,450,722
Accumulated other comprehensive income (loss)	213	319
Accumulated deficit	(1,157,789)	(959,370)
Total stockholders' equity	329,771	492,574
Total liabilities and stockholders' equity	393,688	566,341
Series A Convertible Preferred Shares
Stockholders' equity:
Preferred stock
Series B Convertible Preferred Shares
Stockholders' equity:
Preferred stock