Discontinued Operations Accrued Balance (Detail) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current liabilities of discontinued operations	$ 1,318,000
Total long-term liabilities of discontinued operations	989,000	$ 2,756,000
Ending accrued balance as of June 30, 2015	$ 2,307,000