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		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Income from continuing operations	$ 1,511	$ 1,769	$ 2,665	$ 2,946
Income (loss) from discontinued operations, net of tax	(85)	(334)	(292)	1,904
Net income	$ 1,426	$ 1,435	$ 2,373	$ 4,850
Weighted-average common shares outstanding (basic) (in shares)	5,407	5,364	5,393	5,353
Weighted-average common shares outstanding (diluted) (in shares)	5,423	5,404	5,415	5,398
Net income per share – basic
Continuing operations (in dollars per share)	$ 0.28	$ 0.33	$ 0.49	$ 0.55
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.06)	$ (0.05)	$ 0.36
Net income (in dollars per share)	$ 0.26	$ 0.27	$ 0.44	$ 0.91
Net income per share – diluted:
Continuing operations (in dollars per share)	$ 0.28	$ 0.33	$ 0.49	$ 0.55
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.06)	$ (0.05)	$ 0.35
Net income (in dollars per share)	$ 0.26	$ 0.27	$ 0.44	$ 0.90
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	24	51	22	78
Stock options
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	0	1	0	1
Restricted shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	13	9	15	8
Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	3	30	7	36