Discontinued Operations, Assets Held for Sale, and Business Divestiture - Components of Balance Sheet Accounts Classified as Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Jan. 30, 2015	Sep. 30, 2014
Assets:
Receivables, net	$ 0		$ 91
Deferred income taxes	0		15
Prepaid expenses and other current assets	0		22
Asset held for sale	0		264
Current assets of business from discontinued operations	0		392
Liabilities:
Accounts payable	10		23
Accrued liabilities	0		173
Total current liabilities of business from discontinued operations	$ 10		$ 196
Cash proceeds from sale of building and land, net of selling expenses		$ 1,422