Basis of Presentation and Summary of Significant Accounting Policies - Going Concern (Details) - USD ($) $ in Thousands						3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	May 18, 2020	Mar. 27, 2020	Mar. 23, 2020	Mar. 16, 2020	Jan. 10, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 05, 2020	Jan. 31, 2020
Net loss						$ (304,084)	$ (131,289)	$ (41,571)	$ (32,172)	$ (86,513)	$ (28,806)	$ (30,509)	$ (23,978)	$ (73,743)	$ (54,486)	$ (205,032)	$ (83,293)	$ (509,116)	$ (169,806)	$ (209,484)
Impairment of goodwill and other intangible assets						252,399	97,158			48,127						97,158		349,557	48,127	69,437
Net cash used in operating activities									(42,648)				(21,653)	(14,838)	44,612	(47,357)	(7,391)	(63,851)	23,600	$ 51,777
Working Capital Deficit						147,100				123,500								147,100	123,500
Interest Paid on Long Term Debt																		144,500
Litigation liability																						$ 56,400
Cash and cash equivalents						6,198	9,358	18,406	8,559	36,206	41,206	56,961	29,010	18,406	56,961	9,358	41,206	6,198	36,206		$ 94,100
Liquid cash																					$ 13,400
Accumulated deficit						(1,211,508)	$ (907,422)	$ (776,134)	$ (734,563)	$ (702,392)	$ (615,058)	$ (586,253)	$ (555,744)	$ (776,134)	$ (586,253)	$ (907,422)	$ (615,058)	(1,211,508)	$ (702,392)
Minimum Liquidity Amount	$ 35,000
Cash Saving In Temporary Freeze Of Employee Related Cost			$ 23,400
Cash Saving Due To Refund Of Tax Relating To Aid Relief		$ 29,000
Subsequent Events
Minimum Liquidity Amount	35,000
Accounts Receivable Securitization Facility
Liquid cash						40,000												40,000
Amount of facility					$ 160,000
Facility term (years)					5 years
Minimum Liquidity Amount					$ 40,000
Credit Agreement
Liquid cash						$ 35,000												$ 35,000
Minimum Liquidity Amount	$ 35,000
Source HOV Tax, LLC | Gainline Source Intermediate Holdings LLC
Procceds from membership interest sale				$ 2,000
Source HOV Tax, LLC | Merco Holdings, LLC | Gainline Source Intermediate Holdings LLC
Membership interests				40,000
Source HOV Tax, LLC | Subsequent Events | Gainline Source Intermediate Holdings LLC
Procceds from membership interest sale				2,000
Source HOV Tax, LLC | Subsequent Events | Merco Holdings, LLC | Gainline Source Intermediate Holdings LLC
Membership interests				$ 40,000