Basis of Presentation and Accounting Principles (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
	Sep. 30, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Basis Of Presentation And Accounting Principles [Line Items]
Provision (benefit) for income taxes		$ 803,000	$ (4,575,000)	$ (304,000)	$ (6,943,000)
ASU 2015-15 [Member] | Other Property and Equipment [Member]
Basis Of Presentation And Accounting Principles [Line Items]
Unamortized debt issuance expense	$ 263,584	$ 202,938		202,938
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				3,191,075	$ 3,193,775
ASU 2016-09 [Member]
Basis Of Presentation And Accounting Principles [Line Items]
Provision (benefit) for income taxes				$ 228,000