Debt and Capital Lease Obligations - Loan and Security Agreement - Supplies Distributors - Additional Information (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt and Capital Lease Obligations [Abstract]
Subordinated note outstanding	$ 2,500,000	$ 2,500,000
Minimum
Debt and Capital Lease Obligations [Abstract]
Subordinated note outstanding	2,500,000
Minimum | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Subordinated note outstanding	2,500,000
Maximum
Debt and Capital Lease Obligations [Abstract]
Maximum limit of restricted cash	5,000,000
Wells Fargo | Three Point Eight Million Outstanding Borrowings | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Interest rate on outstanding borrowings		3.75%
Outstanding borrowing		$ 2,300,000
Wells Fargo | 1.0 Million Outstanding Borrowings | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Interest rate on outstanding borrowings		3.00%
Outstanding borrowing		$ 1,000,000
Wells Fargo | Maximum | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Maximum limit of restricted cash	$ 5,000,000
Wells Fargo | Prime Rate | Minimum | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Debt instrument, variable interest rate	0.25%
Wells Fargo | Prime Rate | Maximum | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Debt instrument, variable interest rate	0.75%
Wells Fargo | Eurodollar | Minimum | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Debt instrument, variable interest rate	2.50%
Wells Fargo | Eurodollar | Maximum | Supplies Distributors
Debt and Capital Lease Obligations [Abstract]
Debt instrument, variable interest rate	3.00%