Long-term Debt and Obligations - Additional Information (Detail) - USD ($)	1 Months Ended		3 Months Ended	9 Months Ended
	Oct. 31, 2014	Apr. 30, 2014	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Apr. 16, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Loss on extinguishment of debt				$ 0	$ 581,000
Deferred accrued interest to be repaid together with principal				$ 1,200,000
Annual revenue requirements	$ 55,000,000
Increase in annual revenue in fiscal years	$ 15,000,000
Annual revenue recognize description				The term loan agreement also includes liquidity and revenue-based financial covenants. The Company must satisfy certain minimum annual revenue requirements, specifically $55.0 million for 2015 with annual increases of $15.0 million for each fiscal year thereafter.
Term Loan Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity		$ 45,000,000
Credit facility, outstanding		20,000,000
End of term payment		1,000,000
Amount of make-whole premium payment		300,000
Total incurred and recorded repayment		1,400,000
Percentage of accrue interest	12.50%			12.50%
Percentage of deferred payment	3.50%									3.50%
End of deferred payment term				First four years term
Loss on extinguishment of debt			$ 600,000
Credit facility, additional borrowing capacity	$ 10,000,000								$ 15,000,000
Percentage of redemption fee				4.00%
Principal and interest payment frequency				The Company exercised its option to defer payment of the 3.5% accrued interest and has deferred a total of $1.2 million as of September 30, 2015, which will be repaid together with principal. Principal payments are due in four equal installments during the sixth year of the term.
Term Loan Agreement [Member] | Option to Defer Payment of Interest [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity		$ 51,000,000
Term Loan Agreement [Member] | Scenario, Forecast [Member]
Line of Credit Facility [Line Items]
Credit facility, outstanding							$ 45,000,000
Percentage of deferred payment								3.50%
Credit facility, additional borrowing capacity							$ 5,000,000	$ 10,000,000
Term Loan Agreement [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, additional borrowing capacity	$ 15,000,000
Term Loan Agreement [Member] | Maximum [Member] | Scenario, Forecast [Member]
Line of Credit Facility [Line Items]
Credit facility, additional borrowing capacity						$ 15,000,000