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10. Series B Convertible Preferred Stock Warrants (Tables)
6 Months Ended
Mar. 31, 2017
Warrants and Rights Note Disclosure [Abstract]  
Warrant activity
   Number of units - Series B Convertible preferred warrants   Weighted Average Exercise Price   Weighted Average Remaining Contractual Term (in years)   Intrinsic Value 
Outstanding at September 30, 2016   118,029   $20.80    1.73   $4,307,493 
Granted                   
Exercised                   
Outstanding at March 31, 2017   118,029   $20.80    1.23   $6,927,741 
Exercisable at March 31, 2017   118,029   $20.80    1.23   $6,927,741 
Warrants outstanding and exercisable
Series B Convertible Preferred 
Outstanding   Exercisable 
Number of   Exercise   Number of   Exercise 
Warrants   Price   Warrants   Price 
 54,396   $16.60    54,396   $16.60 
 17,857    16.80    17,857    16.80 
 12,383    24.30    12,383    24.30 
 33,393    28.50    33,393    28.50 
 118,029         118,029