Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 27, 2017
Income Tax Disclosure [Abstract]
Deferred Tax Liability from Reclassified Intangible Asset				$ 8,700
Deferred Tax Liability from Reclassified Indefinite-lived Intangible			$ 4,000
Income Tax Benefit	$ (6,014)	$ 0	$ (12,661)
Valuation Allowance, Deferred Tax Asset, Change in Amount	35,300
Operating Loss Carryforwards, Federal	879,700
Operating Loss Carryforwards, State	83,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Liability Related to Acquisition of Symphony Icon	4,140	10,525
Deferred Tax Assets, Tax Credit Carryforwards, Research	46,306	$ 47,087
Federal Net Operating Loss Change	$ 62,200