Long-term Debt and Line of Credit (Details) (USD $)	3 Months Ended				3 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013 LIBOR	Mar. 31, 2013 Secured Debt	Dec. 31, 2013 Secured Debt	Dec. 31, 2013 Letter of credit Secured Debt	Mar. 31, 2014 Prime Rate Based Loans [Member] Revolving Credit Facility [Member] Secured Debt	Mar. 31, 2014 Prime Rate Based Loans [Member] Swingline Loan [Member] Secured Debt	Mar. 31, 2014 Eurodollar Rate Loan [Member] Revolving Credit Facility [Member] Secured Debt	Mar. 31, 2013 Eligible accounts receivable	Mar. 31, 2013 Adjusted cash balance	Dec. 31, 2013 Amended credit agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 11,800,000										$ 35,000,000
Line of credit facility, current borrowing capacity							20,000,000
Line of credit facility, additional borrowing capacity						25,000,000
Line of Credit Facility, Integral Multiple of Borrowings								500,000	100,000	1,000,000
Line of credit, current borrowing capacity base components											80.00%	90.00%
balance outstanding under revolver		22,500,000
Debt instrument, periodic payment, principal					389,000
Line of credit facility, minimum net worth						180,000,000
Line of credit facility, covenant terms, minimum net worth, incremental amount to base amount, % of current quarter consolidated net income					50.00%
Line of credit facility, covenant terms, minimum net worth, incremental amount to base amount, % of issuances of equity interests					75.00%
Line of credit facility, unused capacity commitment fee percentage					0.25%
Debt instrument, description of variable rate basis	Eurodollar
Line of credit facility, interest rate at period end				2.1875%
Line of credit facility, interest rate during period	2.40%
Letters of credit outstanding, amount							$ 742,000