Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($) award shares	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) tranche award $ / shares shares	Jun. 30, 2018 USD ($)	Sep. 30, 2018
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Number of awards forfeited | award	2		2
2016 Plan
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Aggregate number of shares that may be awarded (in shares)	646,000		646,000
Exercise period for shares awarded under plan			10 years
Number of tranches in award | tranche			2
Share-based compensation expense (benefit) | $	$ (59)	$ 186	$ 367	$ 428
Outstanding share awards that may be awarded (in shares)	118,000		118,000
Outstanding share awards earned and issued at greater than the target number of shares			200.00%
Total unrecognized compensation cost related to performance and restricted shares | $	$ 714		$ 714
Period of recognized compensation cost (in years)			1 year 5 months
2016 Plan | Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Performance period (in years)			3 years
Shares granted in period (in shares)			87,000
Shares forfeited in period (in shares)			7,000
2016 Plan | Performance shares | Minimum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common shares earned pursuant to award (in shares)			0
2016 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			200.00%
2016 Plan | Performance shares, 2018 award year
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common shares earned as percentage of initial target number shares awarded			0.00%		100.00%
Share-based compensation expense (benefit) | $			$ (256)
2016 Plan | Performance and Restricted Shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares granted in period (in shares)			134,000
Shares granted in period, grant date fair value (in dollars per share) | $ / shares			$ 4.73
Vesting period (in years)			3 years
2016 Plan | Restricted Stock
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares granted in period (in shares)			47,000
Shares granted in period, grant date fair value (in dollars per share) | $ / shares			$ 3.15
Vesting period (in years)			1 year
Shares vested per one award (in shares)			77,000
Shares forfeited in period (in shares)			4,000
2016 Plan | Restricted Stock | Director
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares granted in period (in shares)			61,000
2016 Plan | Restricted Stock | Minimum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Vesting period (in years)			1 year
2016 Plan | Restricted Stock | Maximum
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Vesting period (in years)			3 years