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Note 10 - Intangible Assets

12 Months Ended

Mar. 31, 2022

Intangible Assets Disclosure [Text Block]

10. Intangible Assets

Intangible assets at March 31, 2022 and 2021 consisted of the following (in thousands):

	*2022*							*2021*
	*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Gross Amount*		*Accumulated Amortization*			*Net Book Value*		*Estimated Useful Life*
Licenses	$	3,610	$	(3,610	)	$	—	$	3,610	$	(3,610	)	$	—	7
Backlog		681		(631	)		50		600		(475	)		125	2
Trade names and trademarks		1,800		-			1,800		600		-			600	Indefinite
Customer relationships		9,600		(2,723	)		6,877		6,100		(739	)		5,361	7
Core technology and know-how		5,970		(3,386	)		2,584		5,970		(2,903	)		3,067	5-10
Intangible assets	$	21,661	$	(10,350	)	$	11,311	$	16,880	$	(7,727	)	$	9,153

The Company recorded intangible amortization expense of $2.5 million and $1.2 million, for the fiscal years ended March 31, 2022, and 2021, respectively. Additionally, in the fiscal year ended March 31, 2022, the Company recorded $0.2 and $0.5 million related to intangible amortization related to backlog that is reported in cost of revenues for the fiscal years ended March 31, 2022, and 2021, respectively.

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

Fiscal years ending March 31,	*Total*
2023	$	2,803
2024		2,152
2025		1,648
2026		1,221
2027		1,085
Thereafter		602
Total	$	9,511

The Company's intangible assets relate entirely to the Grid business segment operations in the United States.