Intangible Assets

12 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets at March 31, 2017 and 2016 consisted of the following (in thousands):



	2017							2016
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Licenses	$	4,422	$	(4,134	)	$	288	$	4,422	$	(3,739	)	$	683	7
Core technology and know-how	4,806		(4,793		)	13		5,010		(4,839		)	171		5-10
Intangible assets	$	9,228	$	(8,927	)	$	301	$	9,432	$	(8,578	)	$	854

The Company recorded intangible amortization expense of $0.6 million, $0.6 million, and $0.6 million for the fiscal years ended March 31, 2017, 2016, and 2015, respectively.

Expected future amortization expense related to intangible assets is as follows (in thousands):



Fiscal years ending March 31,	Total
2018	301
Total	$	301

The geographic composition of intangible assets is as follows (in thousands):



	March 31,
	2017		2016
Intangible assets by geography:
U.S.	$	301	$	854
Total	$	301	$	854

The business segment composition of intangible assets is as follows (in thousands):



	March 31,
	2017		2016
Intangible assets by business segments:
Grid	301		854
Total	$	301	$	854