Significant Accounting Policies - Goodwill, Income Taxes, and Cash and Cash Equivalents (Details) - USD ($)	6 Months Ended
	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2015
Accounting Policies [Abstract]
Amortization of Intangible Assets	$ 881,000
Goodwill and other intangible assets, net	$ 25,989,000		$ 35,000,000
Cash, FDIC Insured Amount		$ 250,000