Summary of Significant Accounting Policies (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
FDIC insurance limit	$ 250,000
Summary of Significant Accounting Policies (Textual) [Abstract]
Working capital	8,530,629		4,983,165
Original maturity of highly liquid instruments	90 days
Certificates of deposit	9,243,180		6,238,313
Estimated useful lives of property and equipment	generally three to five years
Weighted-average grant-date fair value of options granted	$ 1.58	$ 1.10
Shares authorized but unissued common stock	38,600,000
Shares excluded from the computation of diluted loss per share	19,290,100	41,395,680
FDIC Premium Expense [Member]
Property, Plant and Equipment [Line Items]
FDIC insurance limit	512,459
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Computer and computer equipment depreciation period	3 years
Forecast [Member]
Property, Plant and Equipment [Line Items]
Net of offering costs	$ 19,300,000