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Summary of Significant Accounting Policies - Schedule of Accounts Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Accounting Policies [Abstract]    
Accounts receivable $ 2,577 $ 4,314
Allowance for doubtful accounts (33) (28)
Accounts receivable, net $ 2,544 $ 4,286