Notes Payable (Chambers Credit Agreement) - 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	May. 21, 2014	Feb. 28, 2013	Apr. 26, 2012
Debt Instrument [Line Items]
Interest			$ 6,163,479	$ 5,648,315
Amortization of termination fee	$ 485,049	$ 3,123,838	970,098	3,328,323
Chambers Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, face amount							$ 75,000,000	$ 50,000,000
Original issue discount	6,800,000		6,800,000					3,000,000
Administrative fee	12,500,000		12,500,000					$ 50,000
Interest expense on debt			$ 0	1,189,400
Interest rate			Interest was due monthly at 10% plus the greater of 1% or the 3 month LIBOR rate
Maturity Date			Feb. 28, 2015
LIBOR Rate			1.00%
Debt instrument interest rate			10.00%
Debt instrument LIBOR Rate			11.00%
Debt instrument increase in principal amount			$ 25,000,000
Prepayment penalty description			The Termination Fee was defined as $12.5 million less all interest payments actually made with respect to the $25 million loan prior to such date.
ASD Credit Agreement, closing date			Apr. 26, 2014
Termination fee liability	6,800,000		$ 6,800,000			$ 9,077,778
Interest			$ 5,700,000
Conversion period - Termination Fee Debt Discount			Feb. 28, 2015
Amortization of termination fee	0	3,104,200	$ 0	3,940,689
Amortization of debt discount	$ 0	$ 278,821	$ 0	$ 1,115,280
Debt instrument percentage of contingent interest on non compliance of debt covenant			1.00%
Addition to principal balance and interest expense					$ 1,149,969