Notes Payable (Chambers Credit Agreement) - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	May. 21, 2014	Feb. 28, 2013	Apr. 26, 2012
Debt Instrument [Line Items]
Interest expense on debt	$ 0	$ 836,459
Interest	3,115,736	2,409,018
Chambers Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, face amount					$ 75,000,000	$ 50,000,000
Original issue discount	6,800,000					3,000,000
Administrative fee	12,500,000					$ 50,000
Interest expense on debt	$ 0	$ 264,706
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			$ 9,077,778
Interest	$ 5,700,000
Conversion period - Termination Fee Debt Discount	Feb. 28, 2015
Debt instrument percentage of contingent interest on non compliance of debt covenant	1.00%
Addition to principal balance and interest expense			$ 1,149,969