Nature of Operations (Details Textuals) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2012 Silicon Valley Bank Credit facility	Mar. 30, 2012 Silicon Valley Bank Credit facility
Line of Credit Facility [Line Items]
Working Capital	$ 15,600,000
Cash and cash equivalents	9,461,404	13,856,893	22,802,185	10,955,403
Increase in credit facility						15,000,000
Availability under credit facility					$ 1,900,000