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, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income from continuing operations	$ 921	$ 833
Income from discontinued operations, net of tax	2,494	353
Net income	$ 3,415	$ 1,186
Weighted-average common shares outstanding (basic)	5,340	5,299
Weighted-average common shares outstanding (diluted)	5,385	5,325
Net income per share - basic
Continuing operations	$ 0.17	$ 0.16
Discontinued operations	$ 0.47	$ 0.06
Net income	$ 0.64	$ 0.22
Net income per share - diluted:
Continuing operations	$ 0.17	$ 0.16
Discontinued operations	$ 0.46	$ 0.06
Net income	$ 0.63	$ 0.22
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average common shares outstanding (basic)	1	26
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average common shares outstanding (basic)	8	0
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average common shares outstanding (basic)	36	0