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Selected Balance Sheet Data (Tables)
 6 Months Ended
Mar. 31, 2015
Selected Balance Sheet Data [Abstract]  
Schedule of Selected Balance Sheet Data
(in thousands)
 
March 31, 2015
 
September 30, 2014
Accounts receivable, net:
 
 
 
Accounts receivable
$
28,937

 
$
28,943

Less allowance for doubtful accounts
322

 
367

Accounts receivable, net
$
28,615

 
$
28,576

Inventories:
 
 
 
Raw materials
$
27,773

 
$
26,402

Work in process
789

 
315

Finished goods
5,319

 
4,530

Inventories
$
33,881

 
$
31,247