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Marketable Securities and Fair Value Measurements (Details 2) - Using Significant Unobservable Inputs (Level 3) [Member]
6 Months Ended
Jun. 30, 2015
USD ($)
Change in fair value of the financial assets  
Balance at January 1, 2015 $ 550,000
Decrease in fair value included in change in fair value of common stock warrants (363,500)
Balance at June 30, 2015 $ 186,500