Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Jan. 30, 2015	Mar. 19, 2012
Income Tax Disclosure [Abstract]
Net (loss) income	$ (73,483,000)	$ 17,322,000	$ (67,982,000)	$ 13,942,000	$ 3,070,000
Percentage of net operating loss carry forwards	100.00%		100.00%
Valuation allowance recorded to be reduce to	0.00%		0.00%
Income tax expense or benefit					0
Income tax at the federal statutory rate of 35%			35.00%
Income tax paid			$ 0		$ 0
Valuation allowance equal to net deferred federal income tax asset	100.00%		100.00%		100.00%
Abandoned stock							$ 8,370,000,000
Change in equity ownership	50.00%		50.00%			42.50%	50.00%
Available and utilizable NOL					$ 6,000,000,000
NOLs expiration date			2031
Reserves for uncertain federal income tax positions	$ 0		$ 0
Income tax interest income, expense or penalties			$ 0		$ 0
Income tax examination, year under examination			2011