Long-term Debt and Line of Credit (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 11,800,000
balance outstanding under revolver	22,500,000
Fixed charge coverage ratio	1.50
Leverage ratio	2.50
Line of credit facility, covenant terms, minimum quarterly loss	3,250,000
Debt instrument, description of variable rate basis	Eurodollar
Line of credit facility, interest rate during period		2.40%
LIBOR
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end	2.1875%
Secured Debt
Debt Instrument [Line Items]
Long-term Debt, Fair Value	8,200,000
Line of credit facility, additional borrowing capacity	25,000,000
Debt instrument, periodic payment, principal	389,000
Line of credit facility, unused capacity commitment fee percentage	0.25%
Letter of credit | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity	20,000,000
Letters of credit outstanding, amount	742,000
Prime Rate Based Loans [Member] | Revolving Credit Facility [Member] | Secured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Integral Multiple of Borrowings	500,000
Prime Rate Based Loans [Member] | Swingline Loan [Member] | Secured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Integral Multiple of Borrowings	100,000
Eurodollar Rate Loan [Member] | Revolving Credit Facility [Member] | Secured Debt
Debt Instrument [Line Items]
Line of Credit Facility, Integral Multiple of Borrowings	1,000,000
Eligible accounts receivable
Debt Instrument [Line Items]
Line of credit, current borrowing capacity base components	80.00%
Adjusted cash balance
Debt Instrument [Line Items]
Line of credit, current borrowing capacity base components	90.00%
Amended credit agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 35,000,000