Balance Sheet Components

3 Months Ended

Sep. 30, 2024

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net:


	September 30, 2024		June 30, 2024
	(in thousands)
Accounts receivable	$	66,905	$	54,265
Less: Allowance for price adjustments	(42,284)		(41,689)
Less: Allowance for doubtful accounts	(30)		(30)
Accounts receivable, net	$	24,591	$	12,546

Inventories:


	September 30, 2024		June 30, 2024
	(in thousands)
Raw materials	$	77,872	$	78,064
Work-in-process	84,039		87,898
Finished goods	23,057		29,788
	$	184,968	$	195,750

Other current assets:


	September 30, 2024		June 30, 2024
	(in thousands)
Value-added tax receivable	$	369	$	304
Other prepaid expenses	1,593		1,822
Prepaid insurance	4,142		4,623
Prepaid maintenance	2,113		2,195
Prepayment to supplier	1,586		1,301
Prepaid income tax	823		819
Interest receivable	399		383
Short term deposit	187		21

Other receivables	2,694		2,697

	$	13,906	$	14,165

Property, plant and equipment, net:


	September 30, 2024		June 30, 2024
	(in thousands)
Land	$	4,877	$	4,877

Building and building improvements	71,605		71,266
Manufacturing machinery and equipment	425,108		423,960
Equipment and tooling	35,547		36,203
Computer equipment and software	53,638		53,081
Office furniture and equipment	3,271		3,193
Leasehold improvements	42,686		41,671

	636,732		634,251
Less: accumulated depreciation and amortization	(332,505)		(320,751)
	304,227		313,500
Equipment and construction in progress	23,385		23,119
Property, plant and equipment, net	$	327,612	$	336,619

Intangible assets, net:


	September 30, 2024		June 30, 2024
	(in thousands)
Patents and technology rights	$	18,037	$	18,037
Trade name	268		268
Customer relationships	1,150		1,150
	19,455		19,455
Less: accumulated amortization	(17,020)		(16,208)
	2,435		3,247
Goodwill	269		269
Intangible assets, net	$	2,704	$	3,516

Estimated future minimum amortization expense of intangible assets is as follows (in thousands):


Year ending June 30,
2025 (Remaining)	$	2,435

Other long-term assets:


	September 30, 2024		June 30, 2024
	(in thousands)
Prepayments for property and equipment	$	432	$	620
Investment in a privately held company	—		100



Customs deposit	652		652
Deposit with supplier	21,977		22,117
Other long-term deposits	29		37
Office leases deposits	1,387		1,418
Other	435		295
	$	24,912	$	25,239

Accrued liabilities:


	September 30, 2024		June 30, 2024
	(in thousands)
Accrued compensation and benefits	$	20,063	$	14,945


Warranty accrual	1,848		2,407
Stock rotation accrual	4,452		4,660
Accrued professional fees	2,532		3,198


Accrued inventory	910		728
Accrued facilities related expenses	2,306		2,137

Accrued property, plant and equipment	6,101		6,986
Other accrued expenses	4,406		3,822
Customer deposits	25,635		32,182
ESPP payable	3,184		1,306
	$	71,437	$	72,371

Short-term customer deposits are payments received from customers for securing future product shipments. As of September 30, 2024, $9.0 million were from Customer A, $5.5 million were from Customer B, and $11.1 million were from other customers. As of June 30, 2024, $9.0 million were from Customer A, $8.9 million were from Customer B, and $14.3 million were from other customers.

The activities in the warranty accrual, included in accrued liabilities, are as follows:


	Three Months Ended September 30,
	2024		2023
	(in thousands)
Beginning balance	$	2,407	$	1,674
Additions	(359)		497

Utilization	(200)		(165)
Ending balance	$	1,848	$	2,006

The activities in the stock rotation accrual, included in accrued liabilities, are as follows:


	Three Months Ended September 30,
	2024		2023
	(in thousands)
Beginning balance	$	4,660	$	5,588
Additions	2,251		3,008
Utilization	(2,459)		(3,001)
Ending balance	$	4,452	$	5,595

Other long-term liabilities:


	September 30, 2024		June 30, 2024
	(in thousands)

Customer deposits	$	14,661	$	19,661


Other long-term liabilities	$	14,661	$	19,661

Customer deposits are payments received from customers for securing future product shipments. As of September 30, 2024, $8.0 million were from Customer A, $2.0 million were from Customer B, and $4.7 million were from other customers. As of June 30, 2024, $12.0 million were from Customer A, $2.0 million were from Customer B, and $5.7 million were from other customers.