Property and Equipment and Intangible Assets (Schedule of Property and Equipment and Intangible Assets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,506,207	$ 4,281,497
Less: Accumulated depreciation	(3,613,972)	(3,258,299)
Property and equipment, net	1,892,235	1,023,198
Intangible assets	954,058	671,061
Less: Accumulated amortization	(189,161)	(95,652)
Total intangible assets, net	764,897	575,409
Purchased Software [Member]
Property, Plant and Equipment [Line Items]
Intangible assets	707,698	562,699
Internally Developed Software and Other Intangible Assets [Member]
Property, Plant and Equipment [Line Items]
Intangible assets	246,360	108,362
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,434,373	3,315,812
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	726,558	660,626
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 345,277	$ 305,059