Long-term Debt and Line of Credit (Details) (USD $)	12 Months Ended			12 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 LIBOR	Dec. 31, 2013 Secured debt	Dec. 31, 2013 Letter of credit Secured debt	Dec. 31, 2013 Prime rate based Loans Revolving Line of Credit [Member] Secured debt	Dec. 31, 2013 Prime rate based Loans Swingline loan Secured debt	Dec. 31, 2013 Eurodollar Loans Revolving Line of Credit [Member] Secured debt	Dec. 31, 2013 Purchase of the assets of West Construction Secured debt	Dec. 31, 2013 Eligible accounts receivable	Dec. 31, 2013 Adjusted cash balance	Dec. 31, 2013 Amended credit agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 34,300,000											$ 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%
Proceeds from credit facility	0	18,000,000
Partial repayment of the amount drawn on the credit facility to fund acquisition									2,500,000
Line of credit facility, revolving credit converted to term loan, amount outstanding				8,600,000
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	LIBOR
Line of credit facility, interest rate at period end			2.1875%
Line of credit facility, interest rate during period	2.48%
Letters of credit outstanding, amount					$ 742,000