Description of Business and Basis of Presentation (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Stockholders' Equity Attributable to Parent	$ 89,511	$ 120,755	$ 180,346	$ 349,437	$ 262,109	$ 261,692	$ 260,017	$ 243,934
Additional Paid-in Capital
Stockholders' Equity Attributable to Parent	757,162	740,132	719,514	871,788	733,202	696,923	674,695	635,672
Accumulated Deficit
Stockholders' Equity Attributable to Parent	(650,638)	$ (607,390)	$ (531,979)	(516,859)	$ (467,006)	$ (434,199)	$ (413,080)	$ (391,885)
Accounting Standards Update 2020-06
Debt Instrument, Increase (Decrease), Net	159,400
Adjustment | Accounting Standards Update 2020-06
Stockholders' Equity Attributable to Parent				(159,407)
Adjustment | Accounting Standards Update 2020-06 | Additional Paid-in Capital
Stockholders' Equity Attributable to Parent	(209,700)			(209,651)
Adjustment | Accounting Standards Update 2020-06 | Accumulated Deficit
Stockholders' Equity Attributable to Parent	$ 50,200			$ 50,244