Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2015

Intangible Assets [Abstract]

Schedule of Carrying Value of 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

Schedule of Estimated Future Amortization Expense

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