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Accounts Receivable (Tables)
3 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Schedule of accounts receivable

Accounts receivable consist of the following:

 

    December 31,
2018
    September 30,
2018
 
Trade receivables   $ 14,906     $ 17,791  
Less: long-term receivable recorded in other assets     (1,975 )     (2,209 )
Other receivables     70       103  
Allowance for doubtful accounts     (1,459 )     (1,383 )
Total accounts receivable, net   $ 11,542     $ 14,302