Real Estate Investments - Summary of Income from Properties Sold During the Prior Year (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Lease Termination Income	$ 0	$ 0	$ 0	$ 210
Real Estate Held for Sale [Member]
Rental and Reimbursement Revenue	0	278	0	857
Lease Termination Income	0	0	0	210
Real Estate Taxes	0	(17)	0	(228)
Operating Expenses	0	(36)	0	(85)
Depreciation & Amortization	0	(5)	0	(63)
Interest Expense, including Amortization of Financing Costs	0	(12)	0	(26)
Income from Operations	0	208	0	665
Gain on Sale of Real Estate Investments	0	0	0	5,388
Net Income	$ 0	$ 208	$ 0	$ 6,053