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Accounts Receivable
6 Months Ended
Mar. 31, 2015
Receivables [Abstract]  
Accounts Receivable
Accounts Receivable

The components of accounts receivable consisted of the following:


As of

As of
(in thousands)
March 31,
2015

September 30, 2014
Accounts receivable, gross
$
17,523

 
$
12,885

Allowance for doubtful accounts
(413
)
 
(116
)
Accounts receivable, net
$
17,110

 
$
12,769



The allowance for doubtful accounts is based on the age of receivables and a specific identification of receivables considered at risk of collection.