Condensed Consolidated Balance Sheets - Unaudited - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 84,940		$ 99,120
Marketable securities	209,788		259,172
Interest receivable	1,775		2,447
Prepaid assets	2,300		4,192
Prepaid clinical	5,723		11,505
Assets held for sale	19,368		19,368
Other current assets	546		80
Total current assets	324,440		395,884
Fixed assets, net	43,525		42,222
Right of use assets, net	4,168		2,967
Total assets	372,133		441,073
Current liabilities
Accounts payable	2,443		3,633
Lease liabilities	903		765
Accrued expenses and other	24,916		31,137
Income taxes payable	0		682
Total current liabilities	28,262		36,217
Income tax payable, net of current portion	903		748
Lease liabilities, net of current portion	3,515		2,471
Total liabilities	32,680		39,436
Commitments and contingencies
Redeemable noncontrolling interest	1,341,953		1,396,591
Shareholders' deficit
Additional paid-in capital	231,576		205,736
Accumulated other comprehensive (loss) gain	30		130
Accumulated deficit	(1,234,135)		(1,200,849)
Total shareholders' deficit	(1,002,500)	$ (998,553)	(994,954)
Total liabilities and shareholders' deficit	372,133		441,073
Common Class A [Member]
Shareholders' deficit
Common stock value	13		13
Common Class B [Member]
Shareholders' deficit
Common stock value	$ 16		$ 16