Notes Payable - Additional Information (Detail) - Credit Facility [Member]			9 Months Ended
	Dec. 12, 2014 USD ($)	Oct. 24, 2014 USD ($) Term_loan	Sep. 30, 2015 USD ($) Quarterly_Payments
Debt Instrument [Line Items]
Number of term loan agreements | Term_loan		3
Credit facility frequency of payments			Under the credit facility, each term loan is to be paid over 24 quarterly payment periods, with the first payment due on the last day of the calendar quarter during the period for which the term loan is made.
Credit facility, number of quarterly payment | Quarterly_Payments			24
Credit facility interest at fixed rate		11.50%
Credit facility frequency of interest payments			The first twelve quarterly payments will be interest only payments, and the last twelve quarterly payments will be equal installments in which interest and principal amounts are paid.
Credit facility, number of quarterly interest payment | Quarterly_Payments			12
Credit facility, number of quarterly equal installments payment | Quarterly_Payments			12
Credit facility closing fee percentage			5.00%
Minimum cash and certain cash equivalents to be maintained			$ 5,000,000
Minimum revenue to be achieved in 2015			25,000,000
Minimum revenue to be achieved in 2016			30,000,000
Minimum revenue to be achieved in 2017			40,000,000
Minimum revenue to be achieved in 2018			50,000,000
Minimum revenue to be achieved in 2019			$ 70,000,000
Capital Royalty Term Loan [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity		$ 50,000,000
Credit facility expiration date			Sep. 30, 2015
Credit facility, percentage of interest paid in cash		8.00%
Credit facility, percentage of interest payable in-kind		3.50%
Credit facility, covenants description			The credit facility includes affirmative and negative covenants, including certain minimum financial covenants for pre-specified liquidity and revenue requirements.
First Term Loan [Member]
Debt Instrument [Line Items]
Borrowings under term loan	$ 20,000,000
Credit facility net of closing fees	$ 500,000
Second Term Loan [Member]
Debt Instrument [Line Items]
Credit facility, remaining borrowing capacity			$ 10,000,000
Third Term Loan [Member]
Debt Instrument [Line Items]
Credit facility, remaining borrowing capacity			$ 20,000,000