Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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+ Details

Organization and Basis of Presentation (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncement, Early Adoption [Line Items]
Stockholders' equity	$ 413,164	$ 397,269	$ 372,134	$ 476,526	$ 307,037	$ 267,822	$ 241,948	$ 217,790
Additional paid-in capital
New Accounting Pronouncement, Early Adoption [Line Items]
Stockholders' equity	1,073,532	1,044,732	1,005,785	1,111,435	946,267	916,632	892,510	871,442
Retained earnings (accumulated deficit)
New Accounting Pronouncement, Early Adoption [Line Items]
Stockholders' equity	$ (659,468)	$ (646,344)	$ (631,703)	(631,077)	$ (635,994)	$ (645,278)	$ (646,933)	$ (650,885)
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncement, Early Adoption [Line Items]
Stockholders' equity				(128,972)
Cumulative Effect, Period of Adoption, Adjustment \| Additional paid-in capital
New Accounting Pronouncement, Early Adoption [Line Items]
Stockholders' equity				(132,474)
Cumulative Effect, Period of Adoption, Adjustment \| Retained earnings (accumulated deficit)
New Accounting Pronouncement, Early Adoption [Line Items]
Stockholders' equity				$ 3,502