CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Debt Instrument [Line Items]
Real estate properties, net of accumulated depreciation	$ 77,692	$ 64,290
Mortgage payable and junior subordinated notes, deferred costs	$ 7,040	$ 6,727
Preferred shares, par value (in dollars per share)	$ 0	$ 1
Preferred shares, authorized (in shares)	2,000,000	10,000,000
Preferred shares, outstanding (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, outstanding (in shares)	14,410,000	13,333,000
Real estate properties, net	$ 1,054,484	$ 902,281
Cash and cash equivalents	25,061	12,383
Deposits and escrows	23,265	27,839
Other assets	8,573	9,359
Real estate property held for sale	0	8,969
Mortgages payable	783,532	697,826
Accounts payable and accrued liabilities	22,554	22,348
Mortgages payable
Debt Instrument [Line Items]
Mortgage payable and junior subordinated notes, deferred costs	6,673	6,345
Junior subordinated notes
Debt Instrument [Line Items]
Mortgage payable and junior subordinated notes, deferred costs	367	382
Variable interest entity
Debt Instrument [Line Items]
Real estate properties, net of accumulated depreciation	53,918	52,873
Real estate properties, net	655,889	707,546
Cash and cash equivalents	7,041	8,626
Deposits and escrows	9,916	13,873
Other assets	6,629	8,148
Real estate property held for sale	0	8,969
Mortgages payable	500,912	558,568
Accounts payable and accrued liabilities	10,893	14,419
Variable interest entity | Mortgages payable
Debt Instrument [Line Items]
Mortgage payable and junior subordinated notes, deferred costs	$ 4,200	$ 5,170