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Selected Balance Sheet Data (Tables)
 12 Months Ended
Sep. 30, 2015
Selected Balance Sheet Data [Abstract]  
Schedule of Selected Balance Sheet Data
(in thousands)
 
As of September 30,
 
2015
 
2014
Accounts receivable, net:
 
 
 
Accounts receivable
$
29,688

 
$
28,943

Less allowance for doubtful accounts
483

 
367

Total accounts receivable, net
$
29,205

 
$
28,576

 
 
 
 
Inventories:
 
 
 
Raw materials
$
26,037

 
$
26,402

Work in process
598

 
315

Finished goods
5,242

 
4,530

Total inventories
$
31,877

 
$
31,247

 
 
 
 
Property, equipment and improvements, net:
 
 
 
Land
$
1,800

 
$
1,800

Buildings
10,522

 
10,522

Improvements
3,328

 
3,420

Equipment
15,691

 
13,646

Purchased software
3,458

 
3,559

Furniture and fixtures
2,742

 
2,477

Total property, equipment and improvements, gross
37,541

 
35,424

Less accumulated depreciation and amortization
23,184

 
22,193

Total property, equipment and improvements, net
$
14,357

 
$
13,231