Balance Sheet Components

3 Months Ended

Sep. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net



	September 30, 2020			June 30, 2020
	(in thousands)
Accounts receivable	$	57,876		$	43,394
Less: Allowance for price adjustments	(31,529		)	(30,092		)
Less: Allowance for doubtful accounts	(30		)	(30		)
Accounts receivable, net	$	26,317		$	13,272

Inventories



	September 30, 2020		June 30, 2020
	(in thousands)
Raw materials	$	54,949	$	55,377
Work in-process	67,033		61,863
Finished goods	15,718		18,288
	$	137,700	$	135,528

Other current assets



	September 30, 2020		June 30, 2020
	(in thousands)
VAT receivable	$	1,255	$	1,639
Other prepaid expenses	2,432		1,900
Prepaid insurance	2,761		1,520
Prepaid maintenance	923		587
Prepayment to supplier	1,266		938
Prepaid income tax	1,790		1,991
Customs deposit	23		163
Other receivables	29		69
	$	10,479	$	8,807

Property, plant and equipment, net:



	September 30, 2020			June 30, 2020
	(in thousands)
Land	$	4,877		$	4,877
Building	61,008			58,875
Manufacturing machinery and equipment	477,461			447,079
Equipment and tooling	25,931			25,398
Computer equipment and software	39,212			38,779
Office furniture and equipment	3,595			3,529
Leasehold improvements	71,298			68,224
Land use rights	8,828			8,502
	692,210			655,263
Less: accumulated depreciation	(306,956		)	(291,515		)
	385,254			363,748
Equipment and construction in progress	36,388			48,592
Property, plant and equipment, net	$	421,642		$	412,340

Intangible assets, net:



	September 30, 2020			June 30, 2020
	(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	(3,794		)	(2,954		)
	15,661			16,501
Goodwill	269			269
Intangible assets, net	$	15,930		$	16,770

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



Year ending June 30,
2021 (Remaining)	$	2,520
2022	3,360
2023	3,286
2024	3,249
2025	3,246
	$	15,661

Other long-term assets:



	September 30, 2020		June 30, 2020
	(in thousands)
Prepayments for property and equipment	$	482	$	2,242
Investment in a privately held company	100		100
Customs deposit	1,076		1,662
Other long-term deposits	880		850
Office leases deposits	771		766
Other	164		184
	$	3,473	$	5,804

Accrued liabilities:



	September 30, 2020		June 30, 2020
	(in thousands)
Accrued compensation and benefits	$	22,625	$	19,968
Warranty accrual	707		709
Stock rotation accrual	3,743		3,358
Accrued professional fees	3,712		5,868
Accrued inventory	776		775
Accrued facilities related expenses	2,157		1,831
Accrued property, plant and equipment	10,327		11,039
Other accrued expenses	7,129		8,017
Customer deposit	2,777		2,813
ESPP payable	1,922		608
	$	55,875	$	54,986

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



	Three Months Ended September 30,
	2020			2019
	(in thousands)
Beginning balance	$	709		$	623
Additions	71			21
Utilization	(73		)	(3		)
Ending balance	$	707		$	641

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



	Three Months Ended September 30,
	2020			2019
	(in thousands)
Beginning balance	$	3,358		$	1,921
Additions	3,016			2,565
Utilization	(2,631		)	(1,869		)
Ending balance	$	3,743		$	2,617

Other long-term liabilities:



	September 30, 2020			June 30, 2020
	(in thousands)
Customer deposits	$	6,000	*	$	8,000	*
Computer software liabilities	1,431			1,897
Deferred payroll taxes	1,702			826
Other long-term liabilities	$	9,133		$	10,723

* Customer deposits are from Customer A and Customer B for securing future product shipments from the Company. The Company reclassified $2.0 million of the customer deposit to short term accrued liabilities during the three months ended September 30, 2020 since the repayment of this amount is due within a year.