CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Debt Instrument [Line Items]
Real estate properties, net of accumulated depreciation	$ 85,724	$ 64,290
Deferred mortgage costs	$ 6,735	$ 6,727
Preferred shares, par value (in dollars per share)	$ 0.01	$ 1.0
Preferred shares, authorized (in shares)	2,000,000	2,000,000
Preferred shares, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	15,048,000	13,333,000
Common stock, authorized (in shares)	300,000,000	300,000,000
Shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0.01
Shares of beneficial interest, issued (in shares)	15,048,000	13,333,000
Real estate investment property, net	$ 1,020,874	$ 902,281
Cash and cash equivalents	27,360	12,383
Deposits and escrows	24,458	27,839
Other assets	10,080	9,359
Real estate properties held for sale	38,928	8,969
Mortgages payable	792,432	697,826
Accounts payable and accrued liabilities	27,409	22,348
Mortgages
Debt Instrument [Line Items]
Deferred mortgage costs	6,373	6,345
Junior subordinated notes
Debt Instrument [Line Items]
Deferred mortgage costs	362	382
Variable interest entity
Debt Instrument [Line Items]
Real estate properties, net of accumulated depreciation	52,873	35,525
Real estate investment property, net	586,623	707,546
Cash and cash equivalents	6,699	8,626
Deposits and escrows	11,837	13,873
Other assets	6,781	8,148
Real estate properties held for sale	38,852	8,969
Mortgages payable	481,569	558,568
Accounts payable and accrued liabilities	12,841	14,419
Variable interest entity | Mortgages
Debt Instrument [Line Items]
Deferred mortgage costs	$ 3,786	$ 5,170