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Intangible Assets
 6 Months Ended
Mar. 31, 2015
Intangible Assets [Abstract]  
Intangible Assets
Intangible Assets

The following table sets forth the carrying value of intangible assets:

(in thousands)
 
As of March 31, 2015
 
As of September 30, 2014
 
 
Gross
Assets
 
Accumulated
Amortization
 
Net
Assets
 
Gross Assets
 
Accumulated
Amortization
 
Net
Assets
Fiber Optics:
 
 
 
 
 
 
 
 
 
 
 
 
   Patents
 
3,274

 
(3,204
)
 
70

 
4,697

 
(4,615
)
 
82

Total
 
$
3,274

 
$
(3,204
)
 
$
70

 
$
4,697

 
$
(4,615
)
 
$
82




Amortization expense related to intangible assets is included in selling, general, and administrative expense on our statement of operations and comprehensive income (loss). Based on the carrying amount of our intangible assets as of March 31, 2015, the estimated future amortization expense is as follows:

Estimated Future Amortization Expense
 
(in thousands)
 
Six months ending September 30, 2015
$
12

Fiscal year ending September 30, 2016
25

Fiscal year ending September 30, 2017
33

Fiscal year ending September 30, 2018
—

Fiscal year ending September 30, 2019 and thereafter
—

Total
$
70