Property and Equipment (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,522,615		$ 10,522,615		$ 11,261,906
Less: accumulated depreciation and amortization	(8,979,081)		(8,979,081)		(9,151,135)
Total	1,543,534		1,543,534		2,110,771
Depreciation expense	504,567	693,267	1,210,034	1,135,572
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	67,341		67,341		421,425
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,718,555		2,718,555		2,473,813
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,663,089		7,663,089		8,018,509
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 73,630		$ 73,630		$ 348,159