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, 2012	Dec. 31, 2011	Dec. 31, 2012 LIBOR	Dec. 31, 2012 Secured debt	Dec. 31, 2012 Revolving Line of Credit [Member]	Dec. 31, 2012 Letter of credit Secured debt	Dec. 31, 2012 Prime rate based Loans Revolving Line of Credit [Member] Secured debt	Dec. 31, 2012 Prime rate based Loans Swingline loan Secured debt	Dec. 31, 2012 Eurodollar Loans Revolving Line of Credit [Member] Secured debt	Jan. 31, 2012 Acquisition of Tampa Property from Lazarra Secured debt	Dec. 31, 2012 Purchase of the assets of West Construction Secured debt	Oct. 31, 2012 Purchase of the assets of West Construction Secured debt	Dec. 31, 2012 Eligible accounts receivable	Dec. 31, 2012 Adjusted cash balance	May 31, 2012 Original credit agreement	Dec. 31, 2012 Amended credit agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 31,500,000														$ 75,000,000	$ 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%
Amount drawn on revolving line of credit to purchase property and assets											2,500,000
Proceeds from credit facility	18,000,000	0								13,000,000		5,000,000
Line of credit facility, term loan, amount drawn				10,900,000
Line of credit facility, remaining borrowing capacity					2,100,000
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				10,100,000
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			2.75%
Line of credit facility, interest rate during period	2.40%
Letters of credit outstanding, amount						$ 742,000