Equity (Details) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2016	Mar. 11, 2016
Equity incentive plans
Dividends declared per share (in dollars per share)			$ 0	$ 0	$ 0	$ 0
Restricted Shares
Compensation expense				$ 50,000		$ 50,000
Share Buyback
Shares repurchased (in shares)					21,304
Beneficial interest purchased, price per share (in dollars per share)					$ 8.14
Beneficial interest purchased, value					$ 171,000
Per Share Data
Basic and diluted shares outstanding (in shares)			14,035,074	13,932,515	13,983,495	14,055,436
New Share Repurchase Program
Share Buyback
Beneficial interest purchased authorized amount								$ 5,000,000
Restricted Stock
Restricted Shares
Compensation expense			$ 243,000	$ 221,000	$ 1,063,000	$ 639,000
Deferred unearned compensation			$ 2,599,000		$ 2,599,000		$ 2,089,000
Remaining weighted average vesting period					2 years 7 months 6 days
Incentive Plan 2016
Restricted Shares
Shares authorized for issuance (up to) (in shares)			600,000		600,000
Incentive Plan 2016 | Restricted Stock Units (RSUs)
Restricted Shares
Issued (in shares)		450,000
Vesting period for shares issued					5 years
Compensation expense			$ 110,000		$ 329,000
Deferred unearned compensation			$ 1,643,000		$ 1,643,000		$ 1,972,000
Incentive Plan 2016 | Restricted Stock
Restricted Shares
Issued (in shares)	147,500
Vesting period for shares issued					5 years
Incentive Plan 2012
Restricted Shares
Number of additional awards available for grant (in shares)			0		0
Incentive Plan 2012 | Restricted Stock
Restricted Shares
Shares outstanding (in shares)			689,375		689,375