Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax [Line Items]
Federal statutory income tax rate	34.00%	34.00%	34.00%
Income tax expense			$ 129,000
Deferred tax assets reduced by valuation allowance	50.00%
Domestic Country [Member]
Income Tax [Line Items]
Operating Loss carry forward	159,000,000
Net operating loss used to offset taxable income	1,500,000
State and Local Jurisdiction [Member]
Income Tax [Line Items]
Operating Loss carry forward	143,000,000