Summary of Significant Accounting Policies - Dilutive Effect of the Company's Restricted Shares and Performance Shares (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Net loss	$ (2,609)	$ (2,598)
Weighted-average common shares outstanding (basic) (in shares)	5,467,000	5,452,000
Effect of dilutive securities:
Weighted-average common shares outstanding (diluted) (in shares)	5,467,000	5,452,000
Net loss per share - basic (in dollars per share)	$ (0.48)	$ (0.48)
Net loss per share - diluted (in dollars per share)	$ (0.48)	$ (0.48)
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	59,000	22,000
Restricted Stock
Effect of dilutive securities:
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	0
Restricted Stock
Effect of dilutive securities:
Effect of diluted securities	0	0