Significant Accounting Policies - Assessment of Revenue under ASC 606 (Details) - USD ($) $ in Thousands	3 Months Ended		7 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contracts where payment had not been received, collection is no longer reasonably assured		$ 10,300
Write-off of deferred cost of sales		1,400
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Amounts Invoiced and Not Collected, Prior to Transition Adjustment		48,883
Amounts Invoiced and Not Collected, Transition Adjustment		(21,385)
Amounts Invoiced and Not Collected, Cash collected during the three months ended December 31, 2019 related to the Remaining Contracts	$ (8,219)
Amounts Invoiced and Not Collected, Net Adjustments			$ (29,604)
Amounts Invoiced and Not Collected, Write-off of Customer Contracts where Collection is no Longer Reasonable Assured		(10,273)
Amounts Invoiced and Not Collected, After Transition Adjustment	9,006		9,006
Deferred Cost of Sales, Prior to Transition Adjustment		6,415
Deferred Cost of Sales, Transition Adjustment		(2,565)
Deferred Cost of Sales, Cash Collected During the Three Months Ended December 31, 2019 related to the Remaining Contracts	(1,151)
Deferred Cost of Sales, Net Adjustments			(3,716)
Deferred Cost of Sales, Write-off of Customer Contracts Where Collection is No Longer Reasonably Assured		$ (1,438)
Deferred Cost of Sales, After Transition Adjustment	$ 1,261		$ 1,261