Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses
Selling, general and administrative expenses	$ 29,941	$ 33,793	$ 55,960	$ 48,187
Research and development expenses	10,510	76,544	72,374	168,356
Gain on sale	(101,736)		(101,736)
Total operating (income) expenses	(61,285)	110,337	26,598	216,543
Loss from operations	61,285	(110,337)	(26,598)	(216,543)
Other income (expense)
Other income (expense)	1,991	1,877	499	(17,255)
Interest income	383	260	125	387
Income (Loss) before income taxes	63,659	(108,200)	(25,974)	(233,411)
Net income (loss)	$ 63,659	$ (108,200)	$ (25,974)	$ (233,411)
Income (loss) per share attributable to common shareholders
Basic (in dollars per share)	$ 0.32	$ (0.61)	$ (0.13)	$ (1.33)
Diluted (in dollars per share)	$ 0.32	$ (0.61)	$ (0.13)	$ (1.33)
Weighted-average number of common shares outstanding
Basic (in shares)	200,821	176,585	198,674	175,595
Diluted (in shares)	201,015	176,585	198,674	175,595