Income Taxes (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ (1,537,000)	$ 297,000	$ 1,059,000	$ 2,314,000
Change in valuation allowance	$ (1,000,000)	$ 700,000	$ 2,200,000	$ 2,800,000