Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities (as originally reported)	$ (4,039)	$ (2,604)
Net cash used in investing activities (as re-casted)	$ (4,039)	(2,604)
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Movements in restricted cash		1,558
Accounting Standards Update 2016-18 | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities (as originally reported)		(4,162)
Net cash used in investing activities (as re-casted)		(4,162)
Accounting Standards Update 2016-18 | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash used in investing activities (as originally reported)		(2,604)
Net cash used in investing activities (as re-casted)		$ (2,604)