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Commitments (Details 5) - USD ($)
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Total share based compensation $ 5,517,004 $ 4,135,570 $ 5,062,267
General and administrative [Member]      
Total share based compensation 2,699,557 2,017,199 3,208,220
Research and development [Member]      
Total share based compensation $ 2,817,447 $ 2,118,371 $ 1,854,047