Basis of Presentation and Accounting Principles (Narrative) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Sep. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basis Of Presentation And Accounting Principles [Line Items]
Provision (benefit) for income taxes		$ 567,000	$ (944,000)	$ 263,000	$ (7,887,000)
ASU 2015-15 [Member] | Other Property and Equipment [Member]
Basis Of Presentation And Accounting Principles [Line Items]
Unamortized debt issuance expense	$ 263,584	$ 172,613		172,613
ASU 2015-17 [Member]
Basis Of Presentation And Accounting Principles [Line Items]
Prior period reclassification	$ 310,900
ASU 2016-15 [Member]
Basis Of Presentation And Accounting Principles [Line Items]
Prior period reclassification				4,026,283	$ 7,494,570
ASU 2016-09 [Member]
Basis Of Presentation And Accounting Principles [Line Items]
Provision (benefit) for income taxes				$ 228,000