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Prepaid Expenses and Other Assets (Tables)
6 Months Ended
Mar. 31, 2019
Prepaid Expense and Other Assets [Abstract]  
Schedule of prepaid expenses and other assets

Prepaid expenses and other assets consist of the following: 

 

    March 31,
2019
    September 30,
2018
 
Prepaid expenses and other assets   $ 4,212     $ 5,071  
Unbilled accounts receivable     10,345       10,771  
Total prepaid expenses and other assets   $ 14,557     $ 15,842