Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash	$ 37,860	$ 13,523
Prepaid expenses and other current assets	2,143	2,265
Other receivables	1,714	3,363
Total current assets	41,717	19,151
Restricted cash	5,480	5,720
Property and equipment, net	12,700	12,559
Operating lease right-of-use asset	44,243	44,717
In-process research and development	10,256	10,256
Goodwill	3,490	3,490
Other assets	2,470	2,470
Total assets	120,356	98,363
Current liabilities
Accounts payable and accrued liabilities	4,610	5,689
Accrued compensation	948	768
Convertible debt	71,658
Term debt, current	25,010
Current portion of operating lease liabilities	7,497	9,481
Other current liabilities	322	523
Total current liabilities	110,045	16,461
Operating lease liabilities, net of current portion	28,376	28,583
Convertible debt		58,633
Term debt non-current	35,368	23,674
Deferred tax liability	3,077	3,077
Total liabilities	176,866	130,428
Commitments and contingencies (Note 12)
Stockholders' deficit
Common stock, $0.01 par value; 217,000,000 shares authorized; 36,132,117 and 36,122,932 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	361	361
Additional paid-in capital	276,969	276,393
Accumulated deficit	(333,840)	(308,819)
Total stockholders' deficit	(56,510)	(32,065)
Total liabilities and stockholders' deficit	$ 120,356	$ 98,363