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Note 11 - Intangible Assets

12 Months Ended

Mar. 31, 2023

Intangible Assets Disclosure [Text Block]

11. Intangible Assets

Intangible assets at March 31, 2023 and 2022 consisted of the following (in thousands):

	*2023*							*2022*
	*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		(675	)		6		681		(631	)		50		2
Trade names and trademarks		1,800		-			1,800		1,800		-			1,800		Indefinite
Customer relationships		9,600		(4,980	)		4,620		9,600		(2,723	)		6,877		7
Core technology and know-how		5,970		(3,869	)		2,101		5,970		(3,386	)		2,584		5-10
Intangible assets	$	21,661	$	(13,134	)	$	8,527	$	21,661	$	(10,350	)	$	11,311

The Company recorded intangible amortization expense of $2.8 million and $2.5 million, for the fiscal years ended March 31, 2023 and 2022, respectively. Additionally, the Company recorded less than $0.1 million and $0.2 million related to intangible amortization related to backlog that is reported in cost of revenues for the fiscal years ended March 31, 2023, and 2022, respectively.

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

Fiscal years ending March 31,	*Total*
2024	$	2,158
2025		1,648
2026		1,221
2027		1,085
Thereafter		615
Total	$	6,727

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