Discontinued Operations Accrued Balance (Detail) (USD $)	Mar. 31, 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	$ 2,231,000
Total long-term liabilities of discontinued operations	1,712,000	2,756,000
Ending accrued balance as of December 31, 2014	$ 3,943,000