Financial Results in Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax	$ (580)	$ 476	$ 241
Repair Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	1,339	5,964	7,184
Income (loss) before income tax provision	(808)	(3,104)	(1,142)
Income tax provision (benefit)	(228)	(1,061)	(435)
Income (loss) from discontinued operations, net of tax	(580)	(2,043)	(707)
ASC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		2,727	15,022
Income (loss) before income tax provision		180	1,375
Income tax provision (benefit)		(11)	427
Income (loss) from operations, net of tax		191	948
Gain (loss) on sale of discontinued operations, net of tax		2,328	0
Income (loss) from discontinued operations, net of tax		$ 2,519	$ 948