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Commitments and Contingencies (Tables)
12 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases

Undiscounted future minimum annual lease obligations as of September 30, 2018 are as follows (in thousands):

 

2019   $ 2,796  
2020     2,878  
2021     2,792  
2022     2,744  
2023     2,576  
Thereafter     21,922  
Total future minimum lease obligations   $ 35,708