Note 10 - Intangible Assets

12 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

10.

 Intangible Assets

Intangible assets at

March 

31,

2019

and

2018

consisted of the following (in thousands):

	2019							2018
	Gross Amount		Accumulated Amortization			Net Book Value		Gross Amount		Accumulated Amortization			Net Book Value		Estimated Useful Life
Core technology and know-how	$	4,970	$	(2,080	)	$	2,890	$	8,703	$	(5,473	)	$	3,230	5-10

The Company recorded intangible amortization expense of

$0.3

million and

$0.5

million, for the fiscal years ended

March 

31,

2019,

and

2018,

respectively.

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

Fiscal years ending March 31,	Total
2020		340
2021		340
2022		340
2023		340
2024		340
Thereafter		1,190
Total	$	2,890

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

	March 31,
	2019		2018
Intangible assets by geography:
U.S.	$	2,890	$	3,230
Total	$	2,890	$	3,230

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

	March 31,
	2019		2018
Intangible assets by business segments:
Grid	$	2,890	$	3,230
Total	$	2,890	$	3,230