BALANCE SHEET INFORMATION

12 Months Ended

Mar. 31, 2023

Balance Sheet Related Disclosures [Abstract]

BALANCE SHEET INFORMATION

BALANCE SHEET INFORMATION

Certain significant amounts included in the Company's consolidated balance sheets consist of the following (in thousands):

Manufacturing inventories	March 31,
	2023		2022
Manufactured finished goods	$	6,958	$	14,607
Work in progress	1,304		2,546
Raw materials	11,179		16,393
Total manufacturing inventories	$	19,441	$	33,546

Service inventories	March 31,
	2023		2022
Finished goods	$	19,834	$	19,234
Component parts	5,470		5,020
Total service inventories	$	25,304	$	24,254

Property and equipment, net	March 31,
	2023		2022
Machinery and equipment, and software	$	46,170	$	46,831
Leasehold improvements	14,405		6,029
Furniture and fixtures	848		838
	61,423		53,698
Less: accumulated depreciation	(44,868)		(40,845)
Total property, plant and equipment, net	$	16,555	$	12,853

Depreciation and amortization expense for property and equipment amounted to $10.1 million, $9.4 million, and $5.7 million for the years ended March 31, 2023, 2022, and 2021, respectively.

Intangibles, net	March 31, 2023						March 31, 2022
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Developed technology	$	9,013	$	(6,269)	$	2,744	$	9,208	$	(3,121)	$	6,087
Customer lists	4,398		(2,201)		2,197		4,600		(1,103)		3,497
Intangible assets, net	$	13,411	$	(8,470)	$	4,941	$	13,808	$	(4,224)	$	9,584

Intangible assets amortization expense was $4.6 million, $3.7 million, and $0.1 million for the years ended March 31, 2023, 2022, and 2021, respectively. As of March 31, 2023, the remaining weighted-average amortization period for definite-lived intangible assets was approximately 1.6 years. The Company recorded amortization of developed technology in cost of product revenue, and customer lists in sales and marketing expenses in the consolidated statements of operations.

As of March 31, 2023, the future expected amortization expense for intangible assets is as follows (in thousands):

Fiscal year ending	Estimated future amortization expense
2024	$	3,488
2025	1,453
Thereafter	—
Total	$	4,941

Goodwill	Amount
Balance at March 31, 2022	$	12,969
Goodwill acquired	—
Balance at March 31, 2023	$	12,969

Other accrued liabilities	March 31,
	2023		2022
Accrued expenses	$	1,988	$	4,984
Asset retirement obligation	2,513		4,590
Accrued income taxes	1,509		943
Accrued warranty	2,094		1,899
Accrued interest	494		278
Lease liability	1,364		1,727
Other	3,704		2,141
Total other accrued liabilities	$	13,666	$	16,562

The following table details the change in the accrued warranty balance (in thousands):

	Year Ended March 31,
	2023		2022		2021
Balance as of April 1	$	1,899	$	2,383	2,668
Current period accruals	3,477		3,717		4,699
Adjustments to prior estimates	(18)		(156)		(472)
Charges incurred	(3,264)		(4,045)		(4,512)
Balance as of March 31	$	2,094	$	1,899	$	2,383