Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.10.0.1
Subsequent Events (Details) - USD ($)
 3 Months Ended 12 Months Ended
Oct. 25, 2018
Oct. 03, 2018
Sep. 30, 2016
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Subsequent Event [Line Items]            
Granted (in shares)     0 300,000 750,000 0
Subsequent Event            
Subsequent Event [Line Items]            
New shares issued (in shares)   752,234        
Shares issued (in dollars per share)   $ 34        
Amount of stock issued during period   $ 25,575,956        
Period following an executive's termination of employment for a number of reasons 18 months          
Period following an executive's termination of employment without cause 12 months          
Tranche One | Subsequent Event            
Subsequent Event [Line Items]            
Options vesting (in shares) 3,333          
Period of consecutive trading days 20 days          
Sale of stock (in dollars per share) $ 40.00          
Tranche Two | Subsequent Event            
Subsequent Event [Line Items]            
Options vesting (in shares) 3,333          
Period of consecutive trading days 20 days          
Sale of stock (in dollars per share) $ 45.00          
Tranche Three | Subsequent Event            
Subsequent Event [Line Items]            
Options vesting (in shares) 3,334          
Period of consecutive trading days 20 days          
Sale of stock (in dollars per share) $ 50.00          
Chief Financial Officer | Subsequent Event            
Subsequent Event [Line Items]            
Shares issued (in dollars per share) $ 33.34          
Granted (in shares) 10,000