Components of Balance Sheet Accounts Classified as Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Assets:
Total current assets of business from discontinued operations	$ 0	$ 128
Liabilities:
Total current liabilities of business from discontinued operations	0	196
Repair Group | Discontinued Operations, Held-for-sale or Disposed of by Sale
Assets:
Receivables, net	0	91
Deferred income taxes	0	15
Prepaid expenses and other current assets	0	22
Asset held for sale	0	264
Total current assets of business from discontinued operations	0	392
Liabilities:
Accounts payable	0	23
Accrued liabilities	0	173
Total current liabilities of business from discontinued operations	$ 0	$ 196