Dilutive Effect of Company's Stock Options Restricted Shares and Performance Shares (Detail) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Loss from continuing operations	$ (299,000)	$ (863,000)	$ (2,897,000)	$ (2,205,000)
Income from discontinued operations, net of tax	0	799,000	0	736,000
Net loss	$ (299,000)	$ (64,000)	$ (2,897,000)	$ (1,469,000)
Weighted-average common shares outstanding (basic) (in shares)	5,464	5,438	5,458	5,430
Effect of dilutive securities:
Weighted-average common shares outstanding (diluted) (in shares)	5,464	5,446	5,458	5,447
Net loss per share – basic
Continuing operations (in dollars per share)	$ (0.05)	$ (0.16)	$ (0.53)	$ (0.41)
Discontinued operations (in dollars per share)	0.00	0.15	0.00	0.14
Net loss (in dollars per share)	(0.05)	(0.01)	(0.53)	(0.27)
Net loss per share – diluted:
Continuing operations (in dollars per share)	(0.05)	(0.16)	(0.53)	(0.41)
Discontinued operations (in dollars per share)	0.00	0.15	0.00	0.14
Net loss (in dollars per share)	$ (0.05)	$ (0.01)	$ (0.53)	$ (0.27)
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share	17	20	15	14
Restricted shares
Effect of dilutive securities:
Effect of dilutive securities (in shares)	0	6	0	16
Performance shares
Effect of dilutive securities:
Effect of dilutive securities (in shares)	0	2	0	1
Interest Rate Swap
Net loss per share – diluted:
Derivative, notional amount	$ 8,929		$ 8,929
Derivative, fair value, net	$ 0		$ 0