Intangible Assets

12 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

The carrying values of intangible assets as of the dates presented, respectively, consists of the following (in thousands except years):

	March 31, 2023
	Gross		Accumulated Amortization		Foreign Exchange Rate Changes		Net		Estimated Useful Life (in years)
Patents	$	2,963	$	(2,642)	$	—	$	321	10
Developed Technology - 150 V	560		(517)		(43)		—		6
Developed Technology - 600 V	1,701		(1,570)		(131)		—		6
Total	$	5,224	$	(4,729)	$	(174)	$	321

	March 31, 2022
	Gross		Accumulated Amortization		Foreign Exchange Rate Changes		Net		Estimated Useful Life (in years)
Patents	$	2,963	$	(2,346)	$	—	$	617	10
Developed Technology - 150 V	560		(517)		(43)		—		6
Developed Technology - 600 V	1,701		(1,570)		(131)		—		6
Total	$	5,224	$	(4,433)	$	(174)	$	617

The Company recorded amortization expenses related to intangible assets of $0.3 million for each of the years ended March 31, 2023 and 2022.

Estimated future amortization expenses related to intangible assets as of March 31, 2023 were as follows (in thousands):

Year Ending March 31,
2024	$	296
2025	25
Total	$	321