Business Combination (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 GVT Acquisition [Member]	Sep. 30, 2011 GVT Acquisition [Member]	Sep. 30, 2012 GVT Acquisition [Member]	Sep. 30, 2011 GVT Acquisition [Member]	Jul. 02, 2012 GVT Acquisition [Member]	Sep. 30, 2012 Customer list GVT Acquisition [Member]
Business Combinations [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangibles						$ 500,000		$ 500,000			$ 500,000
Goodwill	28,969,000		28,969,000		27,073,000	1,867,000		1,867,000
Total purchase price						2,367,000		2,367,000		2,400,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual						(5,857,000)	(6,676,000)	(28,947,000)	(25,190,000)
Goodwill amortization for tax purposes								18 years
Business Combination, Pro Forma Information [Abstract]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual						26,696,000	22,378,000	76,910,000	60,346,000
Business Combination, Pro Forma Information, Costs of Goods Sold						6,444,000	4,829,000	18,148,000	13,352,000
Business Combination, Pro Forma Information, Expenses Since Acquisition Date, Total						27,185,000	22,770,000	74,647,000	62,271,000
Business Combination, Pro Forma Earnings Per Share, Basic and Diluted						0	0	0	0
Gain (Loss) on Contract Termination	$ 0	$ (1,300,000)	$ (422,000)	$ (1,730,000)