Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents		$ 111,184	$ 127,965
Collaboration receivable - related party		7,418	8,674
Inventories		41,973	29,647
Prepaid expenses and other current assets		4,606	9,124
Total current assets		165,181	175,410
Property and equipment, net		19,115	22,457
Operating lease assets		105,669	109,793
Restricted cash		8,430	8,185
Restricted investments		1,401	1,401
Other non-current assets	[1]	41,466	41,354
Total assets		341,262	358,600
Current liabilities:
Accounts payable		5,219	3,641
Accrued expenses and other current liabilities	[2]	76,317	80,611
Operating lease liabilities		8,833	6,677
Deferred income - related party		8,109	7,730
Total current liabilities		98,478	98,659
Long term portion of note payable, net of discount		102,009	101,544
Operating lease liabilities, net of current portion		103,341	105,715
Deferred revenue - related party		95,364	95,364
Warrant liabilities		130	546
Other long-term liabilities		1,678	1,628
Total liabilities		401,000	403,456
Commitments and contingencies (Note 15)
Stockholders' deficit:
Preferred stock, $0.001 par value; 10,000,000 shares authorized at March 31, 2024 and December 31, 2023; no shares issued and outstanding at March 31, 2024 and December 31, 2023		0	0
Common stock, $0.001 par value; 240,000,000 shares authorized at March 31, 2024 and December 31, 2023, respectively; 151,442,034 and 135,041,467 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively		151	135
Additional paid-in capital		958,479	933,244
Accumulated other comprehensive loss		0	0
Accumulated deficit		(1,018,368)	(978,235)
Total stockholders' deficit		(59,738)	(44,856)
Total liabilities and stockholders' deficit		$ 341,262	$ 358,600

[1] Includes $38,877 as of March 31, 2024 and December 31, 2023, of milestones related to the construction of the Company's dedicated manufacturing suite at BacThera AG, or Bacthera. Such amounts will form part of the right-of-use asset upon lease commencement.

[2] Includes related party amounts of $36,211 and $28,053 at March 31, 2024 and December 31, 2023, respectively (see Note 17)