Debt Obligations - Additional Information (Details) - USD ($)	1 Months Ended		9 Months Ended
	May. 31, 2014	Apr. 30, 2014	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2013
Line Of Credit Facility [Line Items]
Debt obligation			$ 0	$ 7,500,000
Commercial Bank
Line Of Credit Facility [Line Items]
Number of days outstanding from original due date to be excluded from revolving credit facility calculation			60 days
Commercial Bank | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Increased maximum amount available for borrowing					$ 30,000,000
Line of credit Facility, alternative maximum amount available for borrowing conditions			an amount equal to 85% of certain eligible accounts, which excludes accounts that are over 60 days outstanding from the original due date.
Maturity date of line of credit			Sep. 30, 2016
Line of Credit Facility, Interest Rate Description			Interest is charged at a floating interest rate based on the daily three month LIBOR, plus % applicable margin.
Commercial Bank | Revolving Credit Facility | Scenario One
Line Of Credit Facility [Line Items]
Current maximum amount available for borrowing					$ 25,000,000
Commercial Bank | Revolving Credit Facility | Scenario Two
Line Of Credit Facility [Line Items]
Line of credit facility current borrowing capacity as percentage of certain eligible accounts			85.00%
Commercial Bank | Revolving Credit Facility | LIBOR
Line Of Credit Facility [Line Items]
Floating interest rate based on the daily three month LIBOR, plus applicable margin	2.00%	2.75%