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Warrants (Details Textual) (USD $)
12 Months Ended
Dec. 07, 2009
Dec. 31, 2013
Warrant
Mar. 31, 2007
Warrant
Mar. 31, 2007
Warrant
Warrants Extended By 31 January 2013
Mar. 31, 2007
Warrant
Warrants Extended By 31 January 2018
Class of Warrant or Right [Line Items]          
Number of common stock shares to purchase warrant 2,000,004   1,342,500    
Exercise price (in dollars per share) 1.00 0.023   1.35 1.10
Compensation expenses for issuance of warrants   $ 1,916