Equity (Details) - USD ($)		1 Months Ended		3 Months Ended		9 Months Ended
	Mar. 11, 2016	Feb. 29, 2016	Jan. 31, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015
Share Buyback
Shares repurchased (in shares)		252,000		66,554		318,554
Beneficial interest purchased, price per share (in dollars per share)	$ 7.11	$ 6.26
Beneficial interest purchased, value	$ 474,000	$ 1,584,000				$ 2,058,000
Per Share Data
Basic and diluted shares outstanding (in shares)				13,932,515	14,101,056	14,055,436	14,144,236
New Share Repurchase Program
Share Buyback
Beneficial interest purchased authorized amount	$ 5,000,000
Restricted Stock
Restricted Shares
Compensation expense				$ 221,000	$ 232,000	$ 639,000	$ 676,000
Deferred unearned compensation				$ 2,311,000		$ 2,311,000		$ 2,184,000
Remaining weighted average vesting period						2 years 7 months 18 days
Incentive Plan 2016
Restricted Shares
Shares authorized for issuance (up to) (in shares)				600,000		600,000
Compensation expense						$ 50,000
Incentive Plan 2016 | Restricted Stock Units (RSUs)
Restricted Shares
Issued (in shares)				450,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period				5 years
Vesting period for shares issued				5 years
Compensation expense				$ 50,000
Deferred unearned compensation				$ 2,117,000		$ 2,117,000
Stock Incentive Plan 2012 | Restricted Stock
Restricted Shares
Issued (in shares)			141,050
Shares outstanding (in shares)				667,025		667,025
Vesting period for shares issued						5 years
Equity Incentive Plan 2009
Restricted Shares
Number of additional awards available for grant (in shares)				0		0
Equity Incentive Plan 2009 | Restricted Stock
Restricted Shares
Vesting period for shares issued						5 years
CAGR in shareholder return | Incentive Plan 2016 | Restricted Stock Units (RSUs)
Restricted Shares
Issued (in shares)				200,000
CAGR in adjusted funds from operations | Incentive Plan 2016 | Restricted Stock Units (RSUs)
Restricted Shares
Issued (in shares)				200,000
CAGR relative to FTSE NAREIT Equity Apartment Index | Incentive Plan 2016 | Restricted Stock Units (RSUs)
Restricted Shares
Issued (in shares)				50,000