Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 55,904	$ 140,517
Investments	317,271	215,877
Prepaid expenses and other current assets	5,047	7,666
Total current assets	378,222	364,060
Property and equipment, net	39,172	29,009
Goodwill	39,154	39,154
Intangible assets	25,150	25,724
Restricted cash	1,372	1,340
Deposits	533	608
Investments	34,320	43,276
Operating lease right-of-use assets, net	3,901	1,972
Finance lease right-of-use asset, net	44,517	46,664
Total assets	566,341	551,807
Current liabilities:
Accounts payable and accrued expenses	45,789	36,660
Operating lease liabilities, current	925	773
Finance lease liability, current	1,791	1,736
Total current liabilities	48,505	39,169
Operating lease liabilities, non-current	2,973	1,088
Finance lease liability, non-current	19,353	19,269
Other liabilities	2,936	2,595
Total liabilities	73,767	62,121
Commitments and contingencies (Note 14)
Stockholders' equity:
Common stock, $0.01 par value, 120,000,000 shares authorized; 90,282,267 and 79,123,312 shares issued and 90,282,267 and 79,120,741 shares outstanding at December 31, 2023 and December 31, 2022, respectively	903	791
Treasury stock, at cost, 0 common shares at December 31, 2023 and 2,571 common shares at December 31, 2022	0	(47)
Additional paid-in capital	1,450,722	1,203,074
Accumulated other comprehensive income (loss)	319	(357)
Accumulated deficit	(959,370)	(713,775)
Total stockholders' equity	492,574	489,686
Total liabilities and stockholders' equity	566,341	551,807
Series A Convertible Preferred Shares
Stockholders' equity:
Preferred stock
Series B Convertible Preferred Shares
Stockholders' equity:
Preferred stock