Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 25, 2017 shares	Jun. 30, 2017 USD ($) shares	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) tranche $ / shares shares	Jun. 30, 2016 USD ($)
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Outstanding share awards earned and issued at greater than the target number of shares				150.00%
Restricted Stock | Minimum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Vesting period (in years)				1 year
Restricted Stock | Maximum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Vesting period (in years)				3 years
2007 Plan
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Aggregate number of shares that may be awarded (in shares)	646,000
Vesting period (in years)	10 years
Number of tranches in award | tranche				2
Outstanding share awards that may be awarded (in shares)		391,000		391,000
Share-based compensation expense (benefit) | $		$ 139	$ 228	$ 484	$ (236)
Total unrecognized compensation cost related to performance and restricted shares | $		$ 962		$ 962
Period of recognized compensation cost (in years)				1 year 9 months
2007 Plan | Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Performance period (in years)				3 years
Shares vested in period (in shares)				10,000
Performance shares paid for payroll costs (in shares)				4,000
Shares granted in period (in shares)				69,000
Shares forfeited in period (in shares)				24,000
2007 Plan | Performance shares | Minimum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common shares earned pursuant to award (in shares)				0
2007 Plan | Performance shares | Maximum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common shares earned as percentage of initial target number shares awarded				150.00%
2007 Plan | Performance and Restricted Shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Vesting period (in years)				3 years
Shares granted in period (in shares)				107,000
Shares granted in period, grant date fair value (in dollars per share) | $ / shares				$ 7.45
2007 Plan | Restricted Stock
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares granted in period (in shares)				38,000
Shares forfeited in period (in shares)				7,000
2007 Plan | Restricted Stock | Non-Employee Directors
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Vesting period (in years)				1 year
Shares vested in period (in shares)				29,000
Shares granted in period (in shares)				33,000
Shares granted in period, grant date fair value (in dollars per share) | $ / shares				$ 8.05