Notes Payable (Chambers Credit Agreement) - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	May. 21, 2014	Feb. 28, 2013	Apr. 26, 2012
Debt Instrument [Line Items]
ASD Credit Agreement, closing date	Dec. 31, 2016
Interest				$ 6,282,782	$ 8,550,179
Amortization of termination fee		$ 679,337	$ 555,072	1,205,172	272,646
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		3,940,689
Amortization of debt discount			$ 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