Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Implicit discounts recognized under ASC 606	$ 128,149	$ 124,255
Net operating loss carryforwards	40,314	35,267
Share based compensation	17,595	12,253
Deferred revenue	3,246	2,450
Interest limitations	6,975	4,028
Unamortized intangible assets	157,930	176,783
Research and development	9,186	800
Other assets	3,828	1,559
Total gross deferred tax assets	367,223	357,395
Less: valuation allowance	(364,082)	(357,012)
Total deferred tax assets	3,141	383
Deferred tax liabilities:
Fixed assets	2,185	380
Other liabilities	956	3
Total gross deferred tax liabilities	3,141	383
Net deferred taxes assets (liability)	$ 0	$ 0