Dilutive Effect of Company's Stock Options Restricted Shares and Performance Shares (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Income (loss) from continuing operations	$ (1,007)	$ 1,983	$ (3,212)	$ 4,648
Income (loss) from discontinued operations, net of tax	0	(76)	736	(368)
Net income (loss)	$ (1,007)	$ 1,907	$ (2,476)	$ 4,280
Weighted-average common shares outstanding (basic) (in shares)	5,448	5,413	5,435	5,399
Weighted-average common shares outstanding (diluted) (in shares)	5,454	5,431	5,449	5,420
Net income (loss) per share – basic
Continuing operations (in dollars per share)	$ (0.19)	$ 0.37	$ (0.59)	$ 0.86
Discontinued operations (in dollars per share)	0.00	(0.01)	0.14	(0.07)
Net income (in dollars per share)	(0.19)	0.36	(0.45)	0.79
Net income (loss) per share – diluted:
Continuing operations (in dollars per share)	(0.19)	0.37	(0.59)	0.86
Discontinued operations (in dollars per share)	0.00	(0.01)	0.14	(0.07)
Net income (in dollars per share)	$ (0.19)	$ 0.36	$ (0.45)	$ 0.79
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	15	17	15	20
Restricted shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	6	18	13	16
Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	0	0	1	5