Property and Equipment (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Depreciation expense	$ 109,850	$ 88,900	$ 201,081	$ 167,735
Capital Lease Obligations Incurred	0	0	180,000	0
Less: accumulated depreciation and amortization	(1,268,829)		(1,268,829)		(1,183,982)
Total assets	39,192,592		39,192,592		42,290,226
Leased Equipment [Member]
Depreciation expense	22,600	11,300	35,300	22,600
Equipment [Member]
Capital Lease Obligations	547,400		547,400		432,000
Less: accumulated depreciation and amortization	386,300		386,300		414,200
Capital Lease Obligations [Member]
Depreciation expense			63,200
Total assets	$ 161,100		$ 161,100		$ 17,800