Commitments and Contingencies (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies
Equipment under capital lease consisting of a service vehicles, net of depreciation capitalized	$ 60,000
Rental expense	1,071,798	629,405	533,828
Operating Leases
2013	1,338,804
2014	1,026,702
2015	837,041
2016	793,375
2017	795,565
2018 and thereafter	4,305,562
Total	9,097,049
Capital Leases
2013	13,832
2014	14,719
2015	15,663
2016	14,760
2017	2,892
Total	61,866
Less amounts representing interest	2,580
Present value of minimum lease commitments	$ 59,286

The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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