Debt and Capital Lease Obligations - Loan and Security Agreement - PFS - Additional Information (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Line Of Credit Facility [Line Items]
Subordinated note outstanding	$ 2,500,000		$ 2,500,000
PFS | Comerica
Line Of Credit Facility [Line Items]
Tangible net worth	20,000,000
Working Capital Advances | PFS | Comerica
Line Of Credit Facility [Line Items]
Maximum limit of loans and security agreement	$ 17,000,000
Working Capital Advances and Equipment Advances interest at prime rate plus, Stated percentage	4.25%
Credit facility available under Loans and Security Agreement	$ 16,900,000
Working Capital Seasonal Advances | PFS | Comerica
Line Of Credit Facility [Line Items]
Maximum limit of loans and security agreement	$ 20,000,000
Equipment Advances | PFS | Comerica
Line Of Credit Facility [Line Items]
Maximum limit of loans and security agreement		$ 2,000,000
Working Capital Advances and Equipment Advances interest at prime rate plus, Stated percentage	4.75%
Credit facility available under Loans and Security Agreement	$ 0
Equipment Advances maturity date	Sep. 15, 2017
Prime Rate | Working Capital Seasonal Advances | PFS | Comerica
Line Of Credit Facility [Line Items]
Percentage points added to the reference rate to compute the variable rate on the debt instrument	1.00%
Prime Rate | Equipment Advances | PFS | Comerica
Line Of Credit Facility [Line Items]
Percentage points added to the reference rate to compute the variable rate on the debt instrument	1.50%
Maximum | PFS | Comerica
Line Of Credit Facility [Line Items]
Subordinated note outstanding	$ 5,000,000