Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Mar. 19, 2012
Income Tax Disclosure [Abstract]
Net loss attributable to common and participating stockholders	$ (25,824,000)	$ 17,909,000	$ (12,535,000)	$ 68,959,000
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
Available and utilizable NOL carry forward					$ 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