Dilutive Effect of Company's Stock Options Restricted Shares and Performance Shares (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Income (loss) from continuing operations	$ (1,345)	$ 1,154
(Loss) from discontinued operations, net of tax	(63)	(207)
Net income (loss)	$ (1,408)	$ 947
Weighted-average common shares outstanding (basic) (in shares)	5,422	5,378
Weighted-average common shares outstanding (diluted) (in shares)	5,447	5,408
Net income (loss) per share – basic
Continuing operations (in dollars per share)	$ (0.25)	$ 0.22
Discontinued operations (in dollars per share)	$ (0.01)	$ (0.04)
Net income (in dollars per share)	$ (0.26)	$ 0.18
Net income (loss) per share – diluted:
Continuing operations (in dollars per share)	$ (0.25)	$ 0.21
Discontinued operations (in dollars per share)	$ (0.01)	$ (0.04)
Net income (in dollars per share)	$ (0.26)	$ 0.17
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	8	20
Restricted shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	25	16
Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	0	14