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9. Warrants (Tables)
12 Months Ended
Sep. 30, 2016
Warrants and Rights Note Disclosure [Abstract]  
Warrant activity
  Number of
Units
   Weighted
Average
Exercise
Price
   Weighted
Average
Remaining
Contractual
Term (in years)
   Intrinsic
Value
 
Outstanding at September 30, 2015   590,146   $4.14    2.73   $3,493,092 
Granted                   
Exercised                  
Outstanding at September 30, 2016   590,146   $4.14    1.73   $4,307,493 
Exercisable at September 30, 2016   590,146   $4.14    1.73   $4,307,493 
Warrants outstanding and exercisable
Outstanding   Exercisable 
Number of
Warrants
   Exercise
Price
   Number of
Warrants
   Exercise
Price
 
 271,981   $3.30    271,981   $3.30 
 89,286    3.36    89,286    3.36 
 61,914    4.86    61,914    4.86 
 166,965    5.70    166,965    5.70 
 590,146         590,146