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, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Income from continuing operations	$ 1,469	$ 1,452	$ 2,390	$ 2,285
Income (loss) from discontinued operations, net of tax	(34)	272	2,460	625
Net income	$ 1,435	$ 1,724	$ 4,850	$ 2,910
Weighted-average common shares outstanding (basic)	5,364	5,315	5,353	5,303
Weighted-average common shares outstanding (diluted)	5,404	5,336	5,398	5,326
Net income per share - basic
Continuing operations	$ 0.27	$ 0.27	$ 0.45	$ 0.43
Discontinued operations	$ (0.01)	$ 0.05	$ 0.46	$ 0.12
Net income	$ 0.27	$ 0.32	$ 0.91	$ 0.55
Net income per share - diluted:
Continuing operations	$ 0.27	$ 0.27	$ 0.44	$ 0.43
Discontinued operations	$ (0.01)	$ 0.05	$ 0.46	$ 0.12
Net income	$ 0.27	$ 0.32	$ 0.90	$ 0.55
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share	51	151	78	147
Stock options
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Weighted-average common shares outstanding (basic)	1	20	1	22
Restricted shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Weighted-average common shares outstanding (basic)	9	1	8	1
Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Weighted-average common shares outstanding (basic)	30	0	36	0