Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($) shares	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($) tranche $ / shares shares	Mar. 31, 2018 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			200.00%
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
Outstanding share awards that may be awarded (in shares)	118,000		118,000
Share-based compensation expense (benefit) | $	$ 190	$ 47	$ 426	$ 242
Total unrecognized compensation cost related to performance and restricted shares | $	$ 1,091		$ 1,091
Period of recognized compensation cost (in years)			1 year 6 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 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)			47,000
Shares forfeited in period (in shares)			4,000
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
Director | 2016 Plan | Restricted Stock
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares granted in period (in shares)			61,000