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Fair value measurements (Details 1) - Warrant
9 Months Ended
Sep. 30, 2015
USD ($)
Changes in the fair value of Level 3 liabilities measured at fair value on recurring basis  
Balance at the begining of the period $ 0
Established in 2015 72,333
Change in Fair Value 647,342
Reclassifed to Equity (719,675)
Balance at the end of the period $ 0