CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Debt Instrument [Line Items]
Accumulated depreciation	$ 57,997	$ 41,995
Mortgage payable and junior subordinated notes, deferred costs	$ 7,141	$ 6,275
Preferred shares, par value (in dollars per share)	$ 0.01	$ 1
Preferred shares, authorized (in shares)	20,000,000	10,000,000
Preferred shares, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 3
Common stock, authorized (in shares)	300,000,000
Common stock, issued (in shares)	13,336,000	13,232,000
Mortgages payable
Debt Instrument [Line Items]
Mortgage payable and junior subordinated notes, deferred costs	$ 6,754	$ 5,873
Junior subordinated notes
Debt Instrument [Line Items]
Mortgage payable and junior subordinated notes, deferred costs	$ 387	$ 402