Alpha and Omega Semiconductor Limited (AOSL) 10-Q 7 Nov 23 2024 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Sep. 30, 2023	Oct. 31, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-34717
Entity Registrant Name	Alpha and Omega Semiconductor Limited
Entity Incorporation, State or Country Code	D0
Entity Tax Identification Number	77-0553536
Entity Address, Address Line One	Clarendon House
Entity Address, Address Line Two	2 Church Street
Entity Address, City or Town	Hamilton
Entity Address, Postal Zip Code	HM 11
Entity Address, Country	BM
City Area Code	408
Local Phone Number	830-9742
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Shares
Trading Symbol	AOSL
Security Exchange Name	NASDAQ
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		27,784,521
Entity Central Index Key	0001387467
Current Fiscal Year End Date	--06-30
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Current assets:
Cash and cash equivalents	$ 193,576	$ 195,188
Restricted cash	206	415
Accounts receivable, net	34,403	22,420
Inventories	187,751	183,247
Other current assets	23,993	22,666
Total current assets	439,929	423,936
Property, plant and equipment, net	354,229	357,831
Operating lease right-of-use assets	26,582	24,349
Intangible assets, net	5,953	6,765
Equity method investment	357,878	366,617
Deferred income tax assets	518	536
Other long-term assets	21,278	19,703
Total assets	1,206,367	1,199,737
Current liabilities:
Accrued liabilities	83,948	79,533
Income taxes payable	4,691	5,546
Short-term debt	11,483	11,434
Deferred revenue	9,181	8,073
Finance lease liabilities	884	867
Operating lease liabilities	4,977	4,383
Total current liabilities	187,547	172,561
Long-term debt	35,470	38,360
Income taxes payable - long-term	2,871	2,817
Deferred income tax liabilities	26,083	27,283
Finance lease liabilities - long-term	2,989	3,216
Operating lease liabilities - long-term	22,155	20,544
Other long-term liabilities	43,973	51,037
Total liabilities	321,088	315,818
Commitments and contingencies (Note 12)
Preferred shares, par value $0.002 per share:
Authorized: 10,000 shares; issued and outstanding: none at September 30, 2023 and June 30, 2023	0	0
Common shares, par value $0.002 per share:
Authorized: 100,000 shares; issued and outstanding: 34,903 shares and 27,746 shares, respectively at September 30, 2023 and 34,811 shares and 27,654 shares, respectively at June 30, 2023	70	70
Treasury shares at cost: 7,157 shares at September 30, 2023 and 7,157 shares at June 30, 2023	(79,365)	(79,365)
Additional paid-in capital	330,015	329,034
Accumulated other comprehensive loss	(13,518)	(8,111)
Retained earnings	648,077	642,291
Total Alpha and Omega Semiconductor Limited shareholder's equity	885,279	883,919
Total liabilities and shareholders' equity	1,206,367	1,199,737
Related Party
Current liabilities:
Accounts payable	20,115	11,950
Nonrelated Party
Current liabilities:
Accounts payable	$ 52,268	$ 50,775

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2023	Jun. 30, 2023
Preferred stock, par value (in dollars per share)	$ 0.002	$ 0.002
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common shares, par value (in dollars per share)	$ 0.002	$ 0.002
Common shares, authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	34,903,000	34,811,000
Common stock, shares outstanding (in shares)	27,746,000	27,654,000
Treasury shares (in shares)	7,157,000	7,157,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 180,633	$ 208,476
Cost of goods sold	129,708	137,348
Gross profit	50,925	71,128
Operating expenses
Research and development	22,113	21,389
Selling, general and administrative	19,431	24,205
Total operating expenses	41,544	45,594
Operating income	9,381	25,534
Other income (loss), net	26	(16)
Interest income (expense), net	229	(608)
Net income including noncontrolling interest	9,636	24,910
Income tax expense	1,138	1,374
Net income before income (loss) from equity method investment	8,498	23,536
Equity method investment income (loss) from equity investee	(2,712)	2,502
Net income (loss) including noncontrolling interest	$ 5,786	$ 26,038
Net income per common share
Basic (in dollars per share)	$ 0.21	$ 0.95
Diluted (in dollars per share)	$ 0.19	$ 0.88
Weighted average number of common shares used to compute net income per share
Basic (in shares)	27,693	27,391
Diluted (in shares)	29,786	29,423

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interest	$ 5,786	$ 26,038
Other comprehensive income, net of tax
Foreign currency translation adjustment	(5,407)	(4,907)
Comprehensive income	$ 379	$ 21,131

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Total AOS Shareholders' Equity	Common Shares	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance at Jun. 30, 2022		$ 854,093	$ 68	$ (66,000)	$ 288,951	$ 1,080	$ 629,994
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options and release of restricted stock units		19			19
Reissuance of treasury stock upon exercise of common stock options and release of RSUs		0		4			(4)
Withholding tax on restricted stock units		(370)			(370)
Share-based compensation		10,596			10,596
Net loss	$ 26,038	26,038					26,038
Net income (loss) including noncontrolling interest	26,038
Cumulative translation adjustment		(4,907)				(4,907)
Foreign currency translation adjustment	(4,907)
Ending balance at Sep. 30, 2022		885,469	68	(65,996)	299,196	(3,827)	656,028
Beginning balance at Jun. 30, 2023	883,919	883,919	70	(79,365)	329,034	(8,111)	642,291
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options and release of restricted stock units		446			446
Withholding tax on restricted stock units		(383)			(383)
Share-based compensation		918			918
Net loss	5,786	5,786					5,786
Net income (loss) including noncontrolling interest	5,786
Cumulative translation adjustment		(5,407)				(5,407)
Foreign currency translation adjustment	(5,407)
Ending balance at Sep. 30, 2023	$ 885,279	$ 885,279	$ 70	$ (79,365)	$ 330,015	$ (13,518)	$ 648,077

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income (loss) including noncontrolling interest	$ 5,786	$ 26,038
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,951	9,352
Equity method investment income (loss) from equity investee	2,712	(2,502)
Share-based compensation expense	918	10,596
Deferred income taxes, net	(1,183)	(147)
Loss on disposal of property and equipment	6	398
Changes in operating assets and liabilities
Accounts receivable	(11,984)	9,912
Inventories	(4,504)	(6,907)
Other current and long-term assets	(1,302)	(519)
Accounts payable	3,068	(6,029)
Net payable, equity investee	8,164	(9,472)
Income taxes payable	(802)	471
Increase in deferred revenue	1,109	0
Accrued and other liabilities	(1,116)	5,484
Net cash provided by operating activities	13,823	36,675
Cash flows from investing activities
Purchases of property and equipment	(12,510)	(40,260)
Government grant related to equipment	0	286
Net cash used in investing activities	(12,510)	(39,974)
Cash flows from financing activities
Withholding tax on restricted stock units	(383)	(370)
Proceeds from exercise of stock options and release of restricted stock	446	19
Proceeds from borrowings	0	8,632
Repayments of borrowings	(2,851)	(2,618)
Principal payments on finance leases	(211)	(201)
Net cash provided by (used in) financing activities	(2,999)	5,462
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(135)	(417)
Net increase (decrease) in cash, cash equivalents and restricted cash	(1,821)	1,746
Cash, cash equivalents and restricted cash at beginning of period	195,603	314,651
Cash, cash equivalents and restricted cash at end of period	193,782	316,397
Supplemental disclosures of non-cash investing and financing information:
Property and equipment purchased but not yet paid	3,560	19,360
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	193,576	316,119
Restricted cash	206	278
Total cash, cash equivalents, and restricted cash	$ 193,782	$ 316,397

The Company and Significant Acc

The Company and Significant Accounting Policies	Jan. 26, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company and Significant Accounting Policies	The Company and Significant Accounting Policies The Company Alpha and Omega Semiconductor Limited and its subsidiaries (the “Company”, “AOS”, “we” or “us”) design, develop and supply a broad range of power semiconductors. The Company's portfolio of products targets high-volume applications, including personal and portable computers, graphic cards, flat panel TVs, home appliances, smart phones, battery packs, quick chargers, home appliances, consumer and industrial motor controls and power supplies for TVs, computers, servers and telecommunications equipment. The Company conducts its operations primarily in the United States of America (“USA”), Hong Kong, China, and South Korea. Basis of Preparation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Article 10 of Securities and Exchange Commission Regulation S-X, as amended. They do not include all information and footnotes necessary for a fair presentation of financial position, results of operations and cash flows in conformity with U.S. GAAP for complete financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2023. All significant intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, all adjustments (consisting of normal recurring adjustments and accruals) considered necessary for a fair presentation of the results of operations for the periods presented have been included in the interim periods. Operating results for the three months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the fiscal year ending June 30, 2024 or any other interim period. The consolidated balance sheet at June 30, 2023 is derived from the audited financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2023. Joint Venture On March 29, 2016, the Company entered into a joint venture contract (the “JV Agreement”) with two investment funds owned by the Municipality of Chongqing (the “Chongqing Funds”), pursuant to which the Company and the Chongqing Funds formed a joint venture, (the “JV Company”), for the purpose of constructing and operating a power semiconductor packaging, testing and 12-inch wafer fabrication facility in the Liangjiang New Area of Chongqing, China (the “JV Transaction”). Prior to December 1, 2021, the JV Company was accounted under the provisions of the consolidation guidance since the Company had controlling financial interest. As of December 2, 2021, the Company ceased having control over the JV Company. Therefore, the Company deconsolidated the JV Company as of that date. Subsequently, the Company has accounted for its investment in the JV Company using the equity method of accounting. As of September 30, 2023, the percentage of outstanding JV equity interest beneficially owned by the Company was reduced to 42.2%. Such reduction reflects (i) the sale by the Company of approximately 2.1% of the outstanding JV equity interest which resulted in the deconsolidation of the JV Company, (ii) additional sale by the Company of approximately 1.1% of outstanding JV equity interest in December 2021, (iii) the adoption of an employee equity incentive plan and the issuance of additional equity interest equivalent to 3.99% of the JV Company to investors in exchange for cash in December 2021, and (iv) issuance of additional equity interest of JV to investors in January 2022. Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. GAAP requires the Company to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. To the extent there are material differences between these estimates and actual results, the Company's consolidated financial statements will be affected. On an ongoing basis, the Company evaluates the estimates, judgments and assumptions including those related to stock rotation returns, price adjustments, allowance for doubtful accounts, inventory reserves, warranty accrual, income taxes, leases, share-based compensation, recoverability of and useful lives for property, plant and equipment and intangible assets. Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current operating lease liabilities and long-term operating lease liabilities on the Company's consolidated balance sheets. Finance leases are included in property, plant and equipment, finance lease liabilities and long-term finance leases liabilities on the consolidated balance sheets. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The Company determined its incremental borrowing rate based on the information available at the lease commencement date. The operating lease ROU assets also include any lease payments made and exclude lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options. Operating lease expense is generally recognized on a straight-line basis over the lease term. Variable lease payments are expensed as incurred and are not included within the operating lease ROU asset and lease liability calculation. The Company does not record leases on the consolidated balance sheet with a term of one year or less. The Company elected to combine its lease and non-lease components as a single lease component for all asset classes. Revenue recognition The Company determines revenue recognition through the following steps: (1) identification of the contract with a customer; (2) identification of the performance obligations in the contract; (3) determination of the transaction price; (4) allocation of the transaction price to the performance obligations in the contract; and (5) recognition of revenue when, or as, a performance obligation is satisfied. The Company recognizes product revenue at a point in time when product is shipped to the customer, as determined by the agreed upon shipping terms, net of estimated stock rotation returns and price adjustments that it expects to provide to certain distributors. The Company presents revenue net of sales taxes and any similar assessments. Our standard payment terms range from 30 to 60 days. The Company sells its products primarily to distributors, who in turn sell the products globally to various end customers. The Company allows stock rotation returns from certain distributors. Stock rotation returns are governed by contract and are limited to a specified percentage of the monetary value of products purchased by distributors during a specified period. The Company records an allowance for stock rotation returns based on historical returns, current expectations, and individual distributor agreements. The Company also provides special pricing to certain distributors, primarily based on volume, to encourage resale of the Company's products. Allowance for price adjustments is recorded against accounts receivable and the provision for stock rotation rights is included in accrued liabilities on the consolidated balance sheets. The Company's performance obligations relate to contracts with a duration of less than one year. The Company elected to apply the practical expedient provided in ASC 606, “ Revenue from Contracts with Customers ”. Therefore, the Company is not required to disclose the aggregate amount of transaction price allocated to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. The Company recognizes the incremental direct costs of obtaining a contract, which consist of sales commissions, when control over the products they relate to transfers to the customer. Applying the practical expedient, the Company recognizes commissions as expense when incurred, as the amortization period of the commission asset the Company would have otherwise recognized is less than one year. Packaging and testing services revenue is recognized at a point in time upon shipment of serviced products to the customer. License and Development Revenue Recognition In February 2023, the Company entered into a license agreement with a customer to license the Company’s proprietary Silicon Carbide (SiC) technology and to provide 24-months of engineering and development services for a total fee of $45 million, consisting of an upfront fee of $18 million and $6.8 million paid to the Company in March 2023 and July 2023, respectively, with the remaining amount to be paid upon the achievement of specified engineering services and product milestones. The license and development fee is determined to be one performance obligation and is recognized over the 24 months during which the Company performs the engineering and development services. The Company uses the input method to measure progression, representing a faithful depiction of the transfer of services. During the three months ended September 30, 2023, the Company recorded $5.6 million of license and development revenue. The amount of contract liability is recorded as deferred revenue on the consolidated balance sheets. As of September 30, 2023, the Company had recorded $15.6 million of license and development revenue. In addition, the Company also entered an accompanying supply agreement to provide limited wafer supply to the customer. Share-based Compensation Expense The Company maintains an equity-settled, share-based compensation plan to grant restricted share units and stock options. The Company recognizes expense related to share-based compensation awards that are ultimately expected to vest based on estimated fair values on the date of grant. The fair value of restricted share units is based on the fair value of the Company's common share on the date of grant. For restricted stock awards subject to market conditions, the fair value of each restricted stock award is estimated at the date of grant using the Monte-Carlo pricing model. The fair value of stock options is estimated on the date of grant using the Black-Scholes option valuation model. Share-based compensation expense is recognized on the accelerated attribution basis over the requisite service period of the award, which generally equals the vesting period. The Employee Share Purchase Plan (the “ESPP”) is accounted for at fair value on the date of grant using the Black-Scholes option valuation model. Restricted Cash The Company maintains restricted cash in connection with cash balances temporarily restricted for regular business operations. These balances have been excluded from the Company’s cash and cash equivalents balance and are classified as restricted cash in the Company’s Condensed Consolidated Balance Sheets. As of September 30, 2023 and June 30, 2023, the amount of restricted cash was $0.2 million and $0.4 million, respectively. Equity method investment The Company uses the equity method of accounting when it has the ability to exercise significant influence, but not control, as determined in accordance with generally accepted accounting principles, over the operating and financial policies of the investee. Effective December 1, 2021, the Company reduced its equity interest in the JV Company and no longer controls of the JV Company. As a result, beginning December 2, 2021, the Company records its investment under the equity method of accounting. Since the Company is unable to obtain accurate financial information from the JV Company in a timely manner, the Company records its share of earnings or losses of such affiliate on a one quarter lag. The Company discloses and recognizes intervening events at the JV Company in the lag period that could materially affect our consolidated financial statements, if applicable. The Company records its interest in the net earnings of the equity method investee, along with adjustments for unrealized profits or losses on intra-entity transactions and amortization of basis differences, within earnings or loss from equity interests in the Consolidated Statements of Income. Profits or losses related to intra-entity sales with the equity method investee are eliminated until realized by the investor and investee. Basis differences represent differences between the cost of the investment and the underlying equity in net assets of the investment and are generally amortized over the lives of the related assets that gave rise to them. Equity method goodwill is not amortized or tested for impairment; instead the equity method investment is tested for impairment. The Company reviews for impairment whenever factors indicate that the carrying amount of the investment might not be recoverable. In such a case, the decrease in value is recognized in the period the impairment occurs in the Condensed Consolidated Statements of Income. Valuation of inventories The Company carries inventories at the lower of cost (determined on a first-in, first-out basis) or net realizable value. Cost primarily consists of semiconductor wafers and raw materials, labor, depreciation expenses and other manufacturing expenses and overhead, and packaging and testing fees paid to third parties if subcontractors are used. Valuation of inventories is based on its periodic review of inventory quantities on hand as compared with its sales forecasts, historical usage, aging of inventories, production yield levels and current product selling prices. If actual market conditions are less favorable than those forecasted by the Company, additional future inventory write-downs may be required that could adversely affect its operating results. Adjustments to inventory, once established are not reversed until the related inventory has been sold or scrapped. If actual market conditions are more favorable than expected and the products that have previously been written down are sold, our gross margin would be favorably impacted. Fair Value of Financial Instruments The fair value of cash equivalents is categorized in Level 1 in the fair value hierarchy. Cash equivalents consist primarily of short-term bank deposits. The carrying values of financial instruments such as cash and cash equivalents, accounts receivable and accounts payable approximate their carrying values due to their short-term maturities. The carrying value of the Company's debt is considered a reasonable estimate of fair value which is estimated by considering the current rates available to the Company for debt of the same remaining maturities, structure, credit risk and terms of the debts. Government Grants The Company occasionally receives government grants that provide financial assistance for certain eligible expenditures in China. These grants include reimbursements on interest expense on bank borrowings, payroll tax credits, credit for property, plant and equipment in a particular geographical location, employment credits, as well as business expansion credits. Government grants are not recognized until there is reasonable assurance that the Company will comply with the conditions attaching to it, and that the grant will be received. The Company records such grants either as a reduction of the related expense, a reduction of the cost of the related asset, or as other income depending upon the nature of the grant. As a result of such grants, during the three months ended September 30, 2022, the Company reduced property, plant and equipment by $0.3 million. During the three months ended September 30, 2023, the Company did not receive any grants. Accounting for income taxes Income tax expense or benefit is based on income or loss before income taxes. Deferred tax assets and liabilities are recognized principally for the expected tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts. The Company is subject to income taxes in a number of jurisdictions. Significant judgment is required in determining the worldwide provision for income taxes. There are many transactions and calculations for which the ultimate tax determination is uncertain during the ordinary course of business. The Company establishes accruals for certain tax contingencies based on estimates of whether additional taxes may be due. While the final tax outcome of these matters may differ from the amounts that were initially recorded, such differences will impact the income tax and deferred tax provisions in the period in which such determination is made. Significant management judgment is also required in determining whether deferred tax assets will be realized in full or in part. When it is more likely than not that all or some portion of specific deferred tax assets such as net operating losses or research and development tax credit carryforwards will not be realized, a valuation allowance must be established for the amount of the deferred tax assets that cannot be realized. The Company considers all available positive and negative evidence on a jurisdiction-by-jurisdiction basis when assessing whether it is more likely than not that deferred tax assets are recoverable. The Company considers evidence such as our past operating results, the existence of cumulative losses in recent years and our forecast of future taxable income. The Financial Accounting Standards Board (FASB), issued guidance which clarifies the accounting for income taxes by prescribing a minimum probability threshold that a tax position must meet before a financial statement benefit is recognized. The minimum threshold is defined as a tax position that is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any related appeals or litigation processes, based on the technical merits of the position. The tax benefit to be recognized is measured as the largest amount of benefit that is greater than fifty percent likely to be realized upon ultimate settlement. Although the guidance on the accounting for uncertainty in income taxes prescribes the use of a recognition and measurement model, the determination of whether an uncertain tax position has met those thresholds will continue to require significant judgment by management. If the ultimate resolution of tax uncertainties is different from what is currently estimated, a material impact on income tax expense could result. The Company's provision for income taxes is subject to volatility and could be adversely impacted by changes in earnings or tax laws and regulations in various jurisdictions. The Company is subject to the continuous examination of our income tax returns by the Internal Revenue Service and other tax authorities. The Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. To the extent that the final tax outcome of these matters is different from the amounts recorded, such differences will impact the provision for income taxes in the period in which such determination is made. The provision for income taxes includes the impact of changes to reserves, as well as the related net interest and penalties. Long-lived Assets The Company reviews all long-lived assets whenever events or changes in circumstance indicate that these assets may not be recoverable. When evaluating long-lived assets, if the Company concludes that the estimated undiscounted cash flows attributable to the assets are less than their carrying value, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their respective fair values, which could adversely affect its results of operations. Comprehensive Income Comprehensive income is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. The Company's accumulated other comprehensive income consists of cumulative foreign currency translation adjustments. Total comprehensive income is presented in the Condensed Consolidated Statements of Comprehensive Income. Recent Accounting Pronouncements Recently Adopted Accounting Standards

Equity Method Investment in Equ

Equity Method Investment in Equity Investee	3 Months Ended
	Sep. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Equity Method Investment in Equity Investee	Equity Method Investment in Equity Investee On December 1, 2021 (the “Effective Date”), Alpha & Omega Semiconductor (Shanghai) Ltd. (“AOS SH”) and Agape Package Manufacturing (Shanghai) Limited (“APM SH” and, together with AOS SH, the “Sellers”), each a wholly-owned subsidiary of the Company, entered into a share transfer agreement ("STA") with a third-party investor to sell a portion of the Company's equity interest in the JV Company which consists of a power semiconductor packaging, testing and 12-inch wafer fabrication facility in Chongqing, China (the “Transaction”). The Transaction closed on December 2, 2021 (the “Closing Date”), which reduced the Company’s equity interest in the JV Company from 50.9% to 48.8%. Also, the Company’s right to designate directors on the board of JV Company was reduced to three (3) out of seven (7) directors, from four (4) directors prior to the Transaction. As a result of the Transaction and other factors, the Company no longer has a controlling financial interest in the JV Company and has determined that the JV Company was deconsolidated from the Company’s Consolidated Financial Statements effective as of the Closing Date. On December 24, 2021, the Company entered into a share transfer agreement with another third-party investor, pursuant to which the Company sold to this investor 1.1% of outstanding equity interest held by the Company in the JV Company. In addition, the JV Company adopted an employee equity incentive plan and issued an equity interest equivalent to 3.99% of the JV Company in exchange to cash. As a result of these two transactions, the Company owned 45.8% of the equity interest in the JV Company as of December 31, 2021. On January 26, 2022, the JV Company completed a financing transaction pursuant to a corporate investment agreement (the “Investment Agreement”) between the JV Company and certain third-party investors (the “New Investors”). Under the Investment Agreement, the New Investors purchased newly issued equity interest of the JV Company, representing approximately 7.82% of post-transaction outstanding equity interests of the JV Company, for a total purchase price of RMB 509 million (or approximately USD 80 million based on the currency exchange rate as of January 26, 2022) (the “Investment”). Following the closing of the Investment and as of June 30, 2022, the percentage of outstanding JV equity interest beneficially owned by the Company was reduced to 42.2%. The Company accounts for its investment in the JV Company as an equity method investment and reports its equity in earnings or loss of the JV Company on a three-month lag due to an inability to timely obtain financial information of the JV Company. During the three months ended September 30, 2023 and 2022, the Company recorded a $2.7 million loss and $2.5 million income of its equity share of the JV Company, respectively, using lag reporting. As of September 30, 2023, the percentage of outstanding JV equity interest beneficially owned by the Company was 42.2%.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Sep. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsAs of September 30, 2023, the Company owned 42.2% equity interest in the JV Company, which, by definition, is a related party to the Company. The JV Company supplies 12-inch wafers and provides assembly and testing services to AOS. AOS previously sold 8-inch wafers to the JV Company for further assembly and testing services until January 1, 2023, when it changed to consign the 8-inch wafers to the JV Company. Due to the right of offset of receivables and payables with the JV Company, as of September 30, 2023, AOS recorded the net amount of $20.1 million presented as payable related to equity investee, net, in the Condensed Consolidated Balance Sheet. The purchases by AOS for the three months ended September 30, 2023 and 2022 were $29.8 million and $46.1 million, respectively, and the sales by AOS for the three months ended September 30, 2023 and 2022 were $0.8 million and $16.6 million, respectively.

Net Income (Loss) Per Common Sh

Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited	3 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited	Net Income Per Common Share The following table presents the calculation of basic and diluted net income per share attributable to common shareholders: Three Months Ended September 30, 2023 2022 (in thousands, except per share data) Numerator: Net income $ 5,786 $ 26,038 Denominator: Basic: Weighted average number of common shares used to compute basic net income per share 27,693 27,391 Diluted: Weighted average number of common shares used to compute basic net income per share 27,693 27,391 Effect of potentially dilutive securities: Stock options, RSUs and ESPP shares 2,093 2,032 Weighted average number of common shares used to compute diluted net income per share 29,786 29,423 Net income per share: Basic $ 0.21 $ 0.95 Diluted $ 0.19 $ 0.88 The following potential dilutive securities were excluded from the computation of diluted net income per share as their effect would have been anti-dilutive: Three Months Ended September 30, 2023 2022 (in thousands) Employee stock options and RSUs 63 605 ESPP 170 223 Total potential dilutive securities 233 828

Concentration of Credit Risk an

Concentration of Credit Risk and Significant Customers	3 Months Ended
	Sep. 30, 2023
Risks and Uncertainties [Abstract]
Concentration of Credit Risk and Significant Customers	Concentration of Credit Risk and Significant Customers The Company manages its credit risk associated with exposure to distributors and direct customers on outstanding accounts receivable through the application and review of credit approvals, credit ratings and other monitoring procedures. In some instances, the Company also obtains letters of credit from certain customers. Credit sales, which are mainly on credit terms of 30 to 60 days, are only made to customers who meet the Company's credit requirements, while sales to new customers or customers with low credit ratings are usually made on an advance payment basis. The Company considers its trade accounts receivable to be of good credit quality because its key distributors and direct customers have long-standing business relationships with the Company and the Company has not experienced any significant bad debt write-offs of accounts receivable in the past. The Company closely monitors the aging of accounts receivable from its distributors and direct customers, and regularly reviews their financial positions, where available. Summarized below are individual customers whose revenue or accounts receivable balances were 10% or higher than the respective total consolidated amounts: Three Months Ended September 30, Percentage of revenue 2023 2022 Customer A 23.9 % 24.0 % Customer B 46.6 % 38.6 % Customer D * 11.2 % September 30, June 30, Percentage of accounts receivable Customer A 19.3 % 15.3 % Customer B 45.2 % 17.6 % Customer C 11.2 % 13.3 % Customer D * 30.9 %

Balance Sheet Components

Balance Sheet Components	3 Months Ended
	Sep. 30, 2023
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Balance Sheet Components Accounts receivable, net: September 30, June 30, (in thousands) Accounts receivable $ 73,266 $ 62,426 Less: Allowance for price adjustments (38,833) (39,976) Less: Allowance for doubtful accounts (30) (30) Accounts receivable, net $ 34,403 $ 22,420 Inventories: September 30, June 30, (in thousands) Raw materials $ 89,899 $ 86,620 Work-in-process 72,575 69,426 Finished goods 25,277 27,201 $ 187,751 $ 183,247 Other current assets: September 30, June 30, (in thousands) Value-added tax receivable $ 459 $ 275 Other prepaid expenses 4,161 3,863 Prepaid insurance 3,898 4,162 Prepaid maintenance 1,847 1,697 Prepayment to supplier 10,747 10,689 Prepaid income tax 906 707 Interest receivable 374 135 Other receivables 1,601 1,138 $ 23,993 $ 22,666 Property, plant and equipment, net: September 30, June 30, (in thousands) Land $ 4,877 $ 4,877 Building and building improvements 26,834 26,478 Manufacturing machinery and equipment 404,548 398,757 Equipment and tooling 33,774 32,737 Computer equipment and software 50,748 49,890 Office furniture and equipment 3,080 3,087 Leasehold improvements 39,875 38,787 563,736 554,613 Less: accumulated depreciation (284,069) (272,503) 279,667 282,110 Equipment and construction in progress 74,562 75,721 Property, plant and equipment, net $ 354,229 $ 357,831 Intangible assets, net: September 30, June 30, (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 (13,771) (12,959) 5,684 6,496 Goodwill 269 269 Intangible assets, net $ 5,953 $ 6,765 Estimated future minimum amortization expense of intangible assets is as follows (in thousands): Year ending June 30, 2024 (Remaining) $ 2,437 2025 3,247 $ 5,684 Other long-term assets: September 30, June 30, (in thousands) Prepayments for property and equipment $ 3,274 $ 1,717 Investment in a privately held company 100 100 Customs deposit 995 931 Deposit with supplier 12,191 12,290 Other long-term deposits 37 37 Office leases deposits 1,391 1,274 Other 3,290 3,354 $ 21,278 $ 19,703 Accrued liabilities: September 30, June 30, (in thousands) Accrued compensation and benefits $ 20,159 $ 15,627 Warranty accrual 2,006 1,674 Stock rotation accrual 5,595 5,588 Accrued professional fees 2,398 2,458 Accrued inventory 1,536 1,597 Accrued facilities related expenses 2,261 2,327 Accrued property, plant and equipment 6,767 6,402 Other accrued expenses 4,176 4,401 Customer deposits 35,646 38,082 ESPP payable 3,404 1,377 $ 83,948 $ 79,533 Short-term customer deposits are payments received from customers for securing future product shipments. As of September 30, 2023, $12.5 million were from Customer A and $9.2 million were from Customer B, and $14.0 million were from other customers. As of June 30, 2023, $13.5 million were from Customer A and $9.2 million were from Customer B, and $15.4 million were from other customers. The activities in the warranty accrual, included in accrued liabilities, are as follows: Three Months Ended September 30, 2023 2022 (in thousands) Beginning balance $ 1,674 $ 2,650 Additions 497 205 Utilization (165) (27) Ending balance $ 2,006 $ 2,828 The activities in the stock rotation accrual, included in accrued liabilities, are as follows: Three Months Ended September 30, 2023 2022 (in thousands) Beginning balance $ 5,588 $ 4,798 Additions 3,008 3,677 Utilization (3,001) (3,765) Ending balance $ 5,595 $ 4,710 Other long-term liabilities: September 30, June 30, (in thousands) Customer deposits $ 40,393 $ 46,393 Computer software liabilities 3,580 4,644 Other long-term liabilities $ 43,973 $ 51,037 Customer deposits are payments received from customers for securing future product shipments. As of September 30, 2023, $17.0 million were from Customer A and $10.7 million were from Customer B, and $12.7 million were from other customers. As of June 30, 2023, $21.0 million were from Customer A and $11.7 million were from Customer B, and $13.7 million were from other customers.

Bank Borrowing Bank Borrowing

Bank Borrowing Bank Borrowing	3 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Bank Borrowing	Bank Borrowings Short-term borrowings In September 2023, one of the Company's subsidiaries in China entered into a line of credit facility with China Construction Bank. The purpose of the credit facility is to provide working capital borrowings. The Company could borrow up to approximately RMB 50 million or $6.8 million based on currency exchange rate between RMB and U.S. Dollar on September 30, 2023 with a maturity date of September 8, 2025. As of September 30, 2023, there was no outstanding balance for this loan. In January 2023, one of the Company's subsidiaries in China entered into a line of credit facility with Bank of Communications Limited in China. The purpose of the credit facility is to provide working capital borrowings. The Company could borrow up to approximately RMB 140 million or $20.6 million based on currency exchange rate between RMB and U.S. Dollar on January 31, 2023 with a maturity date of December 1, 2023. As of September 30, 2023, there was no outstanding balance for this loan. In September 2022, one of the Company's subsidiaries in China entered into a line of credit facility with Industrial and Commercial Bank of China. The purpose of the credit facility was to provide working capital borrowings. The Company could borrow up to approximately RMB 72.0 million, or $10.3 million based on currency exchange rate between RMB and U.S. Dollar on September 20, 2022, with a maturity date of September 30, 2023. As of September 30, 2023, there was no outstanding balance and this loan expired. Accounts Receivable Factoring Agreement On August 9, 2019, one of the Company's wholly-owned subsidiaries (the “Borrower”) entered into a factoring agreement with the Hongkong and Shanghai Banking Corporation Limited (“HSBC”), whereby the Borrower assigns certain of its accounts receivable with recourse. This factoring agreement allows the Borrower to borrow up to 70% of the net amount of its eligible accounts receivable of the Borrower with a maximum amount of $30.0 million. The interest rate is based on one month London Interbank Offered Rate (“LIBOR”) plus 1.75% per annum. The Company is the guarantor for this agreement. The Company is accounting for this transaction as a secured borrowing under the Transfers and Servicing of Financial Assets guidance. In addition, any cash held in the restricted bank account controlled by HSBC has a legal right of offset against the borrowing. This agreement, with certain financial covenants required, has no expiration date. On August 11, 2021, the Borrower signed an agreement with HSBC to reduce the borrowing maximum amount to $8.0 million with certain financial covenants required. Other terms remain the same. As of September 30, 2023, the Borrower was in compliance with these covenants. As of September 30, 2023, there was no outstanding balance and the Company had unused credit of approximately $8.0 million. Debt financing In September 2021, Jireh Semiconductor Incorporated (“Jireh”), one of the wholly-owned subsidiaries, entered into a financing arrangement agreement with a company (“Lender”) for the lease and purchase of a machinery equipment manufactured by a supplier. This agreement has a 5 years term, after which Jireh has the option to purchase the equipment for $1. The implied interest rate was 4.75% per annum which was adjustable based on every five basis point increase in 60-month U.S. Treasury Notes, until the final installation and acceptance of the equipment . The total purchase price of this equipment was euro 12.0 million. In April 2021, Jireh made a down payment of euro 6.0 million, representing 50% of the total purchase price of the equipment, to the supplier. In June 2022, the equipment was delivered to Jireh after Lender paid 40% of the total purchase price, for euro 4.8 million, to the supplier on behalf of Jireh. In September 2022, Lender paid the remaining 10% payment for the total purchase price and reimbursed Jireh for the 50% down payment, after the installation and configuration of the equipment. The title of the equipment was transferred to Lender following such payment. The agreement was amended with fixed implied interest rate of 7.51% and monthly payment of principal and interest effective in October 2022. Other terms remain the same. In addition, Jireh purchased hardware for the machine under this financing arrangement. The purchase price of this hardware was $0.2 million. The financing arrangement is secured by this equipment and other equipment which had the carrying amount of $14.8 million as of September 30, 2023. As of September 30, 2023, the outstanding balance of this debt financing was $11.0 million. Long-term bank borrowings On August 18, 2021, Jireh entered into a term loan agreement with a financial institution (the "Bank") in an amount up to $45.0 million for the purpose of expanding and upgrading the Company’s fabrication facility located in Oregon. The obligation under the loan agreement is secured by substantially all assets of Jireh and guaranteed by the Company. The agreement has a 5.5 year term and matures on February 16, 2027. Jireh is required to make consecutive quarterly payments of principal and interest. The loan accrues interest based on adjusted LIBOR plus the applicable margin based on the outstanding balance of the loan. This agreement contains customary restrictive covenants and includes certain financial covenants that the Company is required to maintain. Jireh drew down $45.0 million on February 16, 2022 with the first payment of principal beginning in October 2022. As of September 30, 2023, Jireh was in compliance with these covenants and the outstanding balance of this loan wa s $36.0 million. Maturities of short-term debt and long-term debt were as follows (in thousands): Year ending June 30, 2024 (Remaining) $ 8,621 2025 11,664 2026 11,871 2027 14,344 2028 536 Total principal 47,036 Less: debt issuance costs (83) Total principal, less debt issuance costs $ 46,953 Short-term Debt Long-term Debt Total Principal amount $ 11,518 $ 35,518 $ 47,036 Less: debt issuance costs (35) (48) (83) Total debt, less debt issuance costs $ 11,483 $ 35,470 $ 46,953

Leases

Leases	3 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Leases	Leases The Company evaluates contracts for lease accounting at contract inception and assesses lease classification at the lease commencement date. Operating leases are included in operating lease right-of-use (“ROU”) assets, operating lease liabilities and operating lease liabilities - long-term on the Company's Condensed Consolidated Balance Sheets. Finance leases are included in property, plant and equipment, finance lease liabilities and finance lease liabilities-long-term on the Condensed Consolidated Balance Sheets. The Company recognizes a ROU asset and corresponding lease obligation liability at the lease commencement date where the lease obligation liability is measured at the present value of the minimum lease payments. As most of the leases do not provide an implicit rate, the Company uses its incremental borrowing rate at lease commencement. The Company uses an interest rate commensurate with the interest rate to borrow on a collateralized basis over a similar term with an amount equal to the lease payments. Operating leases are primarily related to offices, research and development facilities, sales and marketing facilities, and manufacturing facilities. In addition, long-term supply agreements to lease gas tank equipment and purchase industrial gases are accounted for as operating leases. Lease agreements frequently include renewal provisions and require the Company to pay real estate taxes, insurance and maintenance costs. For operating leases, the amortization of the ROU asset and the accretion of its lease obligation liability result in a single straight-line expense recognized over the lease term. The finance lease is related to the $5.1 million of a machinery lease financing with a vendor. In September 2022, the lease was amended to make a monthly payment of principal and interest as a fixed amount effective in October 2022. Other terms remain the same. The amendment was accounted for as a debt modification and no gain or loss was recognized. The Company does not record leases on the Condensed Consolidated Balance Sheets with a term of one year or less. The components of the Company’s operating and finance lease expenses are as follows for the periods presented (in thousands): Three Months Ended September 30, 2023 2022 Operating leases: Fixed rent expense $ 2,437 $ 1,413 Variable rent expense 252 237 Finance lease: Amortization of equipment 128 137 Interest 75 57 Short-term leases Short-term lease expenses 40 80 Total lease expenses $ 2,932 $ 1,924 Supplemental balance sheets information related to the Company’s operating and finance leases is as follows (in thousands, except lease term and discount rate): September 30, June 30, Operating Leases : ROU assets associated with operating leases $ 26,582 $ 24,349 Finance Lease: Property, plant and equipment, gross $ 5,133 $ 5,133 Accumulated depreciation (786) (657) Property, plant and equipment, net $ 4,347 $ 4,476 Weighted average remaining lease term (in years) Operating leases 6.02 6.57 Finance lease 4.00 4.25 Weighted average discount rate Operating leases 4.92 % 4.67 % Finance lease 7.51 % 7.51 % Supplemental cash flow information related to the Company’s operating and finance lease is as follows (in thousands): Three Months Ended September 30, 2023 2022 Cash paid from amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,590 $ 1,487 Operating cash flows from finance lease $ 75 $ 57 Financing cash flows from finance lease $ 211 $ 201 Non-cash investing and financing information: Operating lease right-of-use assets obtained in exchange for lease obligations $ 3,588 $ 1,924 Future minimum lease payments are as follows as of September 30, 2023 (in thousands): Year ending June 30, Operating Leases Finance Leases The remainder of fiscal 2024 $ 4,698 $ 858 2025 5,797 1,144 2026 4,959 1,144 2027 4,073 1,145 2028 3,684 191 Thereafter 8,297 — Total minimum lease payments 31,508 4,482 Less amount representing interest (4,376) (609) Total lease liabilities $ 27,132 $ 3,873
Leases	Leases The Company evaluates contracts for lease accounting at contract inception and assesses lease classification at the lease commencement date. Operating leases are included in operating lease right-of-use (“ROU”) assets, operating lease liabilities and operating lease liabilities - long-term on the Company's Condensed Consolidated Balance Sheets. Finance leases are included in property, plant and equipment, finance lease liabilities and finance lease liabilities-long-term on the Condensed Consolidated Balance Sheets. The Company recognizes a ROU asset and corresponding lease obligation liability at the lease commencement date where the lease obligation liability is measured at the present value of the minimum lease payments. As most of the leases do not provide an implicit rate, the Company uses its incremental borrowing rate at lease commencement. The Company uses an interest rate commensurate with the interest rate to borrow on a collateralized basis over a similar term with an amount equal to the lease payments. Operating leases are primarily related to offices, research and development facilities, sales and marketing facilities, and manufacturing facilities. In addition, long-term supply agreements to lease gas tank equipment and purchase industrial gases are accounted for as operating leases. Lease agreements frequently include renewal provisions and require the Company to pay real estate taxes, insurance and maintenance costs. For operating leases, the amortization of the ROU asset and the accretion of its lease obligation liability result in a single straight-line expense recognized over the lease term. The finance lease is related to the $5.1 million of a machinery lease financing with a vendor. In September 2022, the lease was amended to make a monthly payment of principal and interest as a fixed amount effective in October 2022. Other terms remain the same. The amendment was accounted for as a debt modification and no gain or loss was recognized. The Company does not record leases on the Condensed Consolidated Balance Sheets with a term of one year or less. The components of the Company’s operating and finance lease expenses are as follows for the periods presented (in thousands): Three Months Ended September 30, 2023 2022 Operating leases: Fixed rent expense $ 2,437 $ 1,413 Variable rent expense 252 237 Finance lease: Amortization of equipment 128 137 Interest 75 57 Short-term leases Short-term lease expenses 40 80 Total lease expenses $ 2,932 $ 1,924 Supplemental balance sheets information related to the Company’s operating and finance leases is as follows (in thousands, except lease term and discount rate): September 30, June 30, Operating Leases : ROU assets associated with operating leases $ 26,582 $ 24,349 Finance Lease: Property, plant and equipment, gross $ 5,133 $ 5,133 Accumulated depreciation (786) (657) Property, plant and equipment, net $ 4,347 $ 4,476 Weighted average remaining lease term (in years) Operating leases 6.02 6.57 Finance lease 4.00 4.25 Weighted average discount rate Operating leases 4.92 % 4.67 % Finance lease 7.51 % 7.51 % Supplemental cash flow information related to the Company’s operating and finance lease is as follows (in thousands): Three Months Ended September 30, 2023 2022 Cash paid from amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,590 $ 1,487 Operating cash flows from finance lease $ 75 $ 57 Financing cash flows from finance lease $ 211 $ 201 Non-cash investing and financing information: Operating lease right-of-use assets obtained in exchange for lease obligations $ 3,588 $ 1,924 Future minimum lease payments are as follows as of September 30, 2023 (in thousands): Year ending June 30, Operating Leases Finance Leases The remainder of fiscal 2024 $ 4,698 $ 858 2025 5,797 1,144 2026 4,959 1,144 2027 4,073 1,145 2028 3,684 191 Thereafter 8,297 — Total minimum lease payments 31,508 4,482 Less amount representing interest (4,376) (609) Total lease liabilities $ 27,132 $ 3,873

Shareholders' Equity and Share-

Shareholders' Equity and Share-based Compensation	3 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Shareholders' Equity and Share-based Compensation	Shareholders' Equity and Share-based Compensation Share Repurchase In September 2017, the Board of Directors approved a repurchase program (the “Repurchase Program”) that allowed the Company to repurchase its common shares from the open market pursuant to a pre-established Rule 10b5-1 trading plan or through privately negotiated transactions up to an aggregate of $30.0 million. The amount and timing of any repurchases under the Repurchase Program depend on a number of factors, including but not limited to, the trading price, volume and availability of the Company’s common shares. Shares repurchased under this program are accounted for as treasury shares and the total cost of shares repurchased is recorded as a reduction of shareholders' equity. From time to time, treasury shares may be reissued as part of the Company’s share-based compensation programs. Gains on re-issuance of treasury stock are credited to additional paid-in capital; losses are charged to additional paid-in capital to offset the net gains, if any, from previous sales or re-issuance of treasury stock. Any remaining balance of the losses is charged to retained earnings. As of September 30, 2023, the Company had repurchased an aggregate of 7,332,780 shares for a total cost of $81.1 million, at an average price of $11.01 per share, excluding fees and related expenses. No repurchased shares have been retired. Of the 7,332,780 repurchased shares, 175,599 shares with a weighted average repurchase price of $9.97 per share, were reissued at an average price of $4.76 per share pursuant to option exercises and vested restricted share units (“RSU”). As of September 30, 2023, no remaining amount was available under the share repurchase program, which has been terminated. Time-based Restric ted Stock Units ( “ TRSU ” ) The following table summarizes the Company's TRSU activities for the three months ended September 30, 2023: Number of Restricted Stock Weighted Average Weighted Average Aggregate Intrinsic Value Nonvested at June 30, 2023 1,385,065 $ 32.48 1.73 $ 45,430,132 Granted 76,800 $ 32.79 Vested (44,655) $ 31.18 Forfeited (14,501) $ 33.55 Nonvested at September 30, 2023 1,402,709 $ 32.53 1.57 $ 41,856,837 Market-based Restricted Stock Units ( “ MSU ” ) In December 2021, the Company granted 1.0 million market-based restricted stock units ("MSUs") to certain personnel. The number of shares to be earned at the end of performance period was determined based on the Company’s achievement of specified stock prices and revenue thresholds during the performance period from January 1, 2022 to December 31, 2024 as well as the recipients remaining in continuous service with the Company through such period. The MSU vests in four equal annual installments after the end of performance period. The Company estimated the grant date fair values of its MSUs using a Monte-Carlo simulation model. On September 19, 2023, the Compensation Committee of the Board approved a modification of the terms of MSUs to extend the performance period through December 31, 2025, changed the commencement date for the four-year time-based service period January 1, 2025, and reduced the achievement of specified stock prices and revenue thresholds. The fair value of these MSUs was revalued to reflect the change using a Monte-Carlo simulation model with the following assumptions: risk-free interest rate of 4.94%, expected term of 2.28 years, expected volatility of 61.38% and dividend yield of 0%. The Company recognizes the total compensation cost of the modified MSUs beginning on the modification date over the remaining requisite service periods. During the three months ended September 30, 2023 and 2022, the Company recorded approximately negative $6.3 million due to a $6.4 million of reversal of the prior recognized expenses, and $2.0 million of expenses for MSUs, respectively. During the quarter ended September 30, 2018, the Company granted 1.3 million MSUs to certain personnel. The number of shares to be earned at the end of performance period is determined based on the Company’s achievement of specified stock prices and revenue thresholds during the performance period from January 1, 2019 to December 31, 2021 as well as the recipients remaining in continuous service with the Company through such period. The MSUs vest in four equal annual installments after the end of the performance period. The Company estimated the grant date fair values of its MSUs using a Monte-Carlo simulation model. On August 31, 2020, the Compensation Committee of the Board approved a modification of the terms of MSU to (i) extend the performance period through December 31, 2022 and (ii) change the commencement date for the four-year time-based service period to January 1, 2023. The fair value of these MSUs was recalculated to reflect the change as of August 31, 2020 and the unrecognized compensation amount was adjusted to reflect the increase in fair value. The Company recorded $0.3 million and $0.6 million of expenses for MSUs during the three months ended September 30, 2023 and 2022, respectively. The following table summarizes the Company's MSUs activities for the three months ended September 30, 2023: Number of Performance-based Restricted Stock Weighted Average Weighted Average Aggregate Intrinsic Value Nonvested at June 30, 2023 2,108,000 $ 25.86 2.96 $ 69,142,400 Granted — $ — Vested — $ — Forfeited — $ — Nonvested at September 30, 2023 2,108,000 $ 25.86 3.18 $ 62,902,720 Performance-based Restricted Stock Units (“PRSUs”) In March each year since year 2017, the Company granted PRSUs to certain personnel. The number of shares to be earned under the PRSUs is determined based on the level of attainment of predetermined financial goals. The PRSUs vest in four equal annual installments from the first anniversary date after the grant date if certain predetermined financial goals were met. The Company recorded approximately $0.4 million and $1.6 million of e xpens e for these PRSUs during the three months ended September 30, 2023, and 2022 respectively. The following table summarizes the Company’s PRSUs activities for the three months ended September 30, 2023: Number of Performance-based Restricted Stock Weighted Average Weighted Average Aggregate Intrinsic Value Nonvested at June 30, 2023 526,714 $ 32.19 1.78 $ 17,276,219 Granted — $ — Vested — $ — Forfeited — $ — Nonvested at September 30, 2023 526,714 $ 32.19 1.52 $ 15,717,146 Stock Options The Company did not grant any stock options during the three months ended September 30, 2023 and 2022. The following table summarizes the Company's stock option activities for the three months ended September 30, 2023: Weighted Weighted Average Average Remaining Number of Exercise Price Contractual Aggregate Shares Per Share Term (in years) Intrinsic Value Outstanding at June 30, 2023 319,375 $ 7.53 0.72 $ 8,071,631 Exercised (60,000) $ 7.44 $ 1,342,961 Outstanding at September 30, 2023 259,375 $ 7.55 0.47 $ 5,782,281 Options vested and expected to vest 259,375 $ 7.55 0.47 $ 5,782,281 Exercisable at September 30, 2023 259,375 $ 7.55 0.47 $ 5,782,281 Employee Share Purchase Plan (“ESPP”) The assumptions used to estimate the fair values of common shares issued under the ESPP were as follows: Three Months Ended September 30, 2023 Volatility rate 64.0% Risk-free interest rate 4.6% Expected term 1.3 years Dividend yield 0% Share-based Compensation Expense The total share-based compensation expense recognized in the Condensed Consolidated Statements of Income for the periods presented was as follows: Three Months Ended September 30, 2023 2022 (in thousands) Cost of goods sold $ 212 $ 1,788 Research and development 6 2,494 Selling, general and administrative 700 6,314 $ 918 $ 10,596 As of September 30, 2023, total unrecognized compensation cost under the Company's equity plans was $53.2 million, which is expected to be recognized over a weighted-average period of 2.7 years.

Income Taxes

Income Taxes	3 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recognized income tax expense of approximately $1.1 million and $1.4 million for the three months ended September 30, 2023 and 2022, respectively. The income tax expense of $1.1 million for the three months ended September 30, 2023 included a $0.05 million discrete tax expense. The income tax expense of $1.4 million for the three months ended September 30, 2022 included a $0.07 million discrete tax expense. Excluding the discrete income tax items, the income tax expense for the three months ended September 31, 2023 and 2022 was $1.1 million and $1.3 million, respectively, and the effective tax rate for the three months ended September 31, 2023 and 2022 was 15.7% and 4.8%, respectively. The changes in the tax expense and effective tax rate between the periods resulted primarily from changes in the mix of earnings in various geographic jurisdictions between the current year and the same period of last year. The Company files its income tax returns in the United States and in various foreign jurisdictions. The tax years 2004 to 2023 remain open to examination by U.S. federal and state tax authorities. The tax years 2017 to 2023 remain open to examination by foreign tax authorities. The Company's income tax returns are subject to examinations by the Internal Revenue Service and other tax authorities in various jurisdictions. In accordance with the guidance on the accounting for uncertainty in income taxes, the Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of its provision for income taxes. These assessments can require considerable estimates and judgments. As of September 30, 2023, the gross amount of unrecognized tax benefits was approximately $9.4 million, of which $6.3 million, if recognized, would reduce the effective income tax rate in future periods. If the Company's estimate of income tax liabilities proves to be less than the ultimate assessment, then a further charge to expense would be required. If events occur and the payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. The Company does not anticipate any material changes to its uncertain tax positions during the next twelve months. "U.S. Tax Cuts and Jobs Act", Enacted December 22, 2017 On December 22, 2017, the United States enacted tax reform legislation through the Tax Cuts and Jobs Act (“the Tax Act”), which significantly changes the existing U.S. tax laws, including, but not limited to, (1) a reduction in the corporate tax rate from 35% to 21%, (2) a shift from a worldwide tax system to a territorial system, (3) eliminating the corporate alternative minimum tax (AMT) and changing how existing AMT credits can be realized, (4) bonus depreciation that will allow for full expensing of qualified property, (5) creating a new limitation on deductible interest expense and (6) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017. The Company is not currently subject to the Base Erosion and Anti-Abuse (BEAT) tax, which is a tax imposed on certain entities who make payments to their non U.S. affiliates, where such payments reduce the U.S. tax base. The BEAT tax is imposed at a rate of 10% on Adjusted Taxable Income, excluding certain payments to foreign related entities. It is an incremental tax over and above the corporate income tax and is recorded as a period cost. It is possible that this tax could be applicable in future periods, which would cause an increase to the effective tax rate and cash taxes. “The Chip and Science Act of 2022”, Enacted August 2, 2022 In August 2022 the U.S. enacted the Chip and Science Act of 2022 (the Chips Act). The Chips Act provides incentives to semiconductor chip manufacturers in the United States, including providing a 25% manufacturing investment credits for investments in semiconductor manufacturing property placed in service after December 31, 2022, for which construction begins before January 1, 2027. Property investments qualify for the 25% credit if, among other requirements, the property is integral to the operation of an advanced manufacturing facility, defined as having a primary purpose of manufacturing semiconductors or semiconductor manufacturing equipment. Currently, we are evaluating the impact of the Chips Act to us. “The Inflation Reduction Act”, Enacted August 16, 2022 In August 2022 the United States enacted tax legislation through the Inflation Reduction Act (IRA). The IRA introduces a 15% corporate alternative minimum tax (CAMT) for corporations whose average annual adjusted financial statement income (AFSI) for any consecutive three-tax-year period preceding the applicable tax year exceeds $1 billion. The CAMT is effective for tax years beginning after December 31, 2022. The CAMT is currently not applicable to the Company. Altera Litigation On July 27, 2015, in Altera Corp. v. Commissioner, the U.S. Tax Court issued an opinion related to the treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. In the July 2015 ruling, the Tax Court concluded that the sharing of the cost of employee stock compensation in a company’s cost-sharing arrangement was invalid under the U.S. Administrative Procedures Act. In June 2019, a panel of the Ninth Circuit of the U.S. Court of Appeals reversed this decision. In July 2019, Altera petitioned U.S. Court of Appeals for the Ninth Circuit to hold an en banc rehearing of the case. The petition was subsequently denied by the Ninth Circuit. Altera appealed the case to the U.S. Supreme Court in February 2020, but the U.S. Supreme Court declined to hear the case in June 2020, leaving intact the U.S. Court of Appeals for the Ninth Circuit’s decision. AOS has not recorded any benefit related to the Altera Corporation Tax Court decision in any period through December 2022. The Company will continue to monitor ongoing developments and potential impact to its financial statements.

Segment and Geographic Informat

Segment and Geographic Information	3 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Segment and Geographic Information	Segment and Geographic Information The Company is organized as, and operates in, one operating segment: the design, development and supply of power semiconductor products for computing, consumer electronics, communication and industrial applications. The chief operating decision-makers are the Executive Chairman and the Chief Executive Officer. The financial information presented to the Company’s Executive Chairman and Chief Executive Officer is on a consolidated basis, accompanied by information about revenue by customer and geographic region, for purposes of evaluating financial performance and allocating resources. The Company has one business segment, and there are no segment managers who are held accountable for operations, operating results and plans for products or components below the consolidated unit level. Accordingly, the Company reports as a single operating segment. The Company sells its products primarily to distributors in the Asia Pacific region, who in turn sell these products to end customers. Because the Company’s distributors sell their products to end customers which may have a global presence, revenue by geographical location is not necessarily representative of the geographical distribution of sales to end user markets. In February 2023, the Company entered into a license agreement with a customer to license the Company’s proprietary SiC technology and to provide 24-month engineering and development services for a total fee of $45 million. The revenue by geographical location in the following tables is based on the country or region in which the products were shipped to: Three Months Ended September 30, 2023 2022 (in thousands) Hong Kong $ 141,206 $ 172,296 China 26,619 28,014 South Korea 5,311 2,897 United States 1,395 4,484 Other countries 6,102 785 $ 180,633 $ 208,476 The following is a summary of revenue by product type: Three Months Ended September 30, 2023 2022 (in thousands) Power discrete $ 121,500 $ 144,573 Power IC 52,747 62,320 Packaging and testing services 745 1,583 License and development services 5,641 — $ 180,633 $ 208,476 Long-lived assets, net consisting of property, plant and equipment and operating lease right-of-use assets, net by geographical area are as follows: September 30, June 30, (in thousands) China $ 115,168 $ 114,822 United States 261,190 263,083 Other countries 4,453 4,275 $ 380,811 $ 382,180

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Commitments As of September 30, 2023 and June 30, 2023, the Company had approximately $107.9 million and $127.5 million, respectively, of outstanding purchase commitments primarily for purchases of semiconductor raw materials, wafers, spare parts, packaging and testing services and others. As of September 30, 2023 and June 30, 2023, the Company had approximately $13.9 million and $9.7 million, respectively, of capital commitments for the purchase of property and equipment. Other Commitments See Note 7 and Note 8 of the Notes to the Condensed Consolidated Financial Statements contained in this Quarterly Report on Form 10-Q for descriptions of commitments including bank borrowings and leases. Contingencies and Indemnities The Company has in the past, and may from time to time in the future, become involved in legal proceedings arising from the normal course of business activities. The semiconductor industry is characterized by frequent claims and litigation, including claims regarding patent and other intellectual property rights as well as improper hiring practices. Irrespective of the validity of such claims, the Company could incur significant costs in the defense of such claims and suffer adverse effects on its operations. In December 2019, the U.S. Department of Justice (“DOJ”) commenced an investigation into the Company's compliance with export control regulations relating to its business transactions with Huawei and its affiliates (“Huawei”), which were added to the “Entity List” maintained by the Department of Commerce (“DOC”) on May 16, 2019. The Company is cooperating fully with federal authorities in the investigation, including responding to requests for documents, information and interviews from DOJ in connection with the investigation. The Company has maintained an export control compliance program and has been committed to comply fully with all applicable laws and regulations. In connection with this investigation, DOC requested the Company to suspend shipments of its products to Huawei, and the Company complied with such request, and the Company has not shipped any product to Huawei after December 31, 2019. The Company is currently working with DOC to resolve this issue. Given the case is in still ongoing and neither DOJ nor DOC has provided the Company with any clear indication of the timing and schedule for the investigation, the Company cannot estimate the reasonably possible loss or range of loss that may occur. Also, the Company is unable to predict the duration, scope, result or related costs of the investigation, although the Company expects to incur additional professional fees as a result of this matter. In addition, the Company is unable to predict what, if any, further action that may be taken by the government in connection with the investigation, or what, if any, penalties, sanctions or remedial actions may be sought. The Company is a party to a variety of agreements that it has contracted with various third parties. Pursuant to these agreements, the Company may be obligated to indemnify another party to such an agreement with respect to certain matters. Typically, these obligations arise in the context of contracts entered into by the Company, under which the Company customarily agrees to hold the other party harmless against losses arising from a breach of representations and covenants related to such matters as title to assets sold, certain intellectual property rights, specified environmental matters and certain income taxes. In these circumstances, payment by the Company is customarily conditioned on the other party making a claim pursuant to the procedures specified in the particular contract, which procedures typically allow the Company to challenge the other party's claim. Further, the Company's obligations under these agreements may be limited in time and/or amount, and in some instances, the Company may have recourse against third parties for certain payments made by it under these agreements. The Company has not historically paid or recorded any material indemnifications, and no accrual was made at September 30, 2023 and June 30, 2023. The Company has agreed to indemnify its directors and certain employees as permitted by law and pursuant to its Bye-laws, and has entered into indemnification agreements with its directors and executive officers. The Company has not recorded a liability associated with these indemnification arrangements, as it historically has not incurred any material costs associated with such indemnification obligations. Costs associated with such indemnification obligations may be mitigated by insurance coverage that the Company maintains. However, such insurance may not cover any, or may cover only a portion of, the amounts the Company may be required to pay. In addition, the Company may not be able to maintain such insurance coverage at reasonable cost, if at all, in the future.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net loss	$ 5,786	$ 26,038

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	Trading Plans or Rule 10b5-1 Trading Plans The table below summarizes the material terms of trading arrangements adopted by any of our executive officers or directors during the September 2023 quarter. All of the trading arrangements listed below are intended to satisfy the affirmative defense of Rule 10b5-1(c). Name Title Date of Adoption End Date 1 Aggregate number of shares common shares to be sold pursuant to 10b5-1 trading agreements Michael L. Pfeiffer Director September 14, 2023 September 13, 2024 21,546 Bing Xue Executive Vice President of Worldwide Sales and Business Development September 1, 2023 January 29, 2024 6,875
Rule 10b5-1 Arrangement Adopted	true
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Michael L. Pfeiffer [Member]
Trading Arrangements, by Individual
Name	Michael L. Pfeiffer
Title	Director
Adoption Date	September 14, 2023
Arrangement Duration	365 days
Aggregate Available	21,546
Bing Xue [Member]
Trading Arrangements, by Individual
Name	Bing Xue
Title	Executive Vice President of Worldwide Sales and Business Development
Adoption Date	September 1, 2023
Arrangement Duration	150 days
Aggregate Available	6,875

The Company and Significant A_2

The Company and Significant Accounting Policies (Policies)	3 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Preparation	Basis of Preparation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Article 10 of Securities and Exchange Commission Regulation S-X, as amended. They do not include all information and footnotes necessary for a fair presentation of financial position, results of operations and cash flows in conformity with U.S. GAAP for complete financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2023. All significant intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, all adjustments (consisting of normal recurring adjustments and accruals) considered necessary for a fair presentation of the results of operations for the periods presented have been included in the interim periods. Operating results for the three months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the fiscal year ending June 30, 2024 or any other interim period. The consolidated balance sheet at June 30, 2023 is derived from the audited financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2023.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. GAAP requires the Company to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. To the extent there are material differences between these estimates and actual results, the Company's consolidated financial statements will be affected. On an ongoing basis, the Company evaluates the estimates, judgments and assumptions including those related to stock rotation returns, price adjustments, allowance for doubtful accounts, inventory reserves, warranty accrual, income taxes, leases, share-based compensation, recoverability of and useful lives for property, plant and equipment and intangible assets.
Leases	Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current operating lease liabilities and long-term operating lease liabilities on the Company's consolidated balance sheets. Finance leases are included in property, plant and equipment, finance lease liabilities and long-term finance leases liabilities on the consolidated balance sheets.
Revenue recognition	Revenue recognition The Company determines revenue recognition through the following steps: (1) identification of the contract with a customer; (2) identification of the performance obligations in the contract; (3) determination of the transaction price; (4) allocation of the transaction price to the performance obligations in the contract; and (5) recognition of revenue when, or as, a performance obligation is satisfied. The Company recognizes product revenue at a point in time when product is shipped to the customer, as determined by the agreed upon shipping terms, net of estimated stock rotation returns and price adjustments that it expects to provide to certain distributors. The Company presents revenue net of sales taxes and any similar assessments. Our standard payment terms range from 30 to 60 days. The Company sells its products primarily to distributors, who in turn sell the products globally to various end customers. The Company allows stock rotation returns from certain distributors. Stock rotation returns are governed by contract and are limited to a specified percentage of the monetary value of products purchased by distributors during a specified period. The Company records an allowance for stock rotation returns based on historical returns, current expectations, and individual distributor agreements. The Company also provides special pricing to certain distributors, primarily based on volume, to encourage resale of the Company's products. Allowance for price adjustments is recorded against accounts receivable and the provision for stock rotation rights is included in accrued liabilities on the consolidated balance sheets. The Company's performance obligations relate to contracts with a duration of less than one year. The Company elected to apply the practical expedient provided in ASC 606, “ Revenue from Contracts with Customers ”. Therefore, the Company is not required to disclose the aggregate amount of transaction price allocated to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. The Company recognizes the incremental direct costs of obtaining a contract, which consist of sales commissions, when control over the products they relate to transfers to the customer. Applying the practical expedient, the Company recognizes commissions as expense when incurred, as the amortization period of the commission asset the Company would have otherwise recognized is less than one year.
Share-based Compensation Expense	Share-based Compensation Expense The Company maintains an equity-settled, share-based compensation plan to grant restricted share units and stock options. The Company recognizes expense related to share-based compensation awards that are ultimately expected to vest based on estimated fair values on the date of grant. The fair value of restricted share units is based on the fair value of the Company's common share on the date of grant. For restricted stock awards subject to market conditions, the fair value of each restricted stock award is estimated at the date of grant using the Monte-Carlo pricing model. The fair value of stock options is estimated on the date of grant using the Black-Scholes option valuation model. Share-based compensation expense is recognized on the accelerated attribution basis over the requisite service period of the award, which generally equals the vesting period. The Employee Share Purchase Plan (the “ESPP”) is accounted for at fair value on the date of grant using the Black-Scholes option valuation model.
Restricted Cash	Restricted CashThe Company maintains restricted cash in connection with cash balances temporarily restricted for regular business operations. These balances have been excluded from the Company’s cash and cash equivalents balance and are classified as restricted cash in the Company’s Condensed Consolidated Balance Sheets.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The fair value of cash equivalents is categorized in Level 1 in the fair value hierarchy. Cash equivalents consist primarily of short-term bank deposits. The carrying values of financial instruments such as cash and cash equivalents, accounts receivable and accounts payable approximate their carrying values due to their short-term maturities. The carrying value of the Company's debt is considered a reasonable estimate of fair value which is estimated by considering the current rates available to the Company for debt of the same remaining maturities, structure, credit risk and terms of the debts.
Government Grants	Government GrantsThe Company occasionally receives government grants that provide financial assistance for certain eligible expenditures in China. These grants include reimbursements on interest expense on bank borrowings, payroll tax credits, credit for property, plant and equipment in a particular geographical location, employment credits, as well as business expansion credits. Government grants are not recognized until there is reasonable assurance that the Company will comply with the conditions attaching to it, and that the grant will be received. The Company records such grants either as a reduction of the related expense, a reduction of the cost of the related asset, or as other income depending upon the nature of the grant.
Accounting for income taxes	Accounting for income taxes Income tax expense or benefit is based on income or loss before income taxes. Deferred tax assets and liabilities are recognized principally for the expected tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts. The Company is subject to income taxes in a number of jurisdictions. Significant judgment is required in determining the worldwide provision for income taxes. There are many transactions and calculations for which the ultimate tax determination is uncertain during the ordinary course of business. The Company establishes accruals for certain tax contingencies based on estimates of whether additional taxes may be due. While the final tax outcome of these matters may differ from the amounts that were initially recorded, such differences will impact the income tax and deferred tax provisions in the period in which such determination is made. Significant management judgment is also required in determining whether deferred tax assets will be realized in full or in part. When it is more likely than not that all or some portion of specific deferred tax assets such as net operating losses or research and development tax credit carryforwards will not be realized, a valuation allowance must be established for the amount of the deferred tax assets that cannot be realized. The Company considers all available positive and negative evidence on a jurisdiction-by-jurisdiction basis when assessing whether it is more likely than not that deferred tax assets are recoverable. The Company considers evidence such as our past operating results, the existence of cumulative losses in recent years and our forecast of future taxable income. The Financial Accounting Standards Board (FASB), issued guidance which clarifies the accounting for income taxes by prescribing a minimum probability threshold that a tax position must meet before a financial statement benefit is recognized. The minimum threshold is defined as a tax position that is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any related appeals or litigation processes, based on the technical merits of the position. The tax benefit to be recognized is measured as the largest amount of benefit that is greater than fifty percent likely to be realized upon ultimate settlement. Although the guidance on the accounting for uncertainty in income taxes prescribes the use of a recognition and measurement model, the determination of whether an uncertain tax position has met those thresholds will continue to require significant judgment by management. If the ultimate resolution of tax uncertainties is different from what is currently estimated, a material impact on income tax expense could result. The Company's provision for income taxes is subject to volatility and could be adversely impacted by changes in earnings or tax laws and regulations in various jurisdictions. The Company is subject to the continuous examination of our income tax returns by the Internal Revenue Service and other tax authorities. The Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. To the extent that the final tax outcome of these matters is different from the amounts recorded, such differences will impact the provision for income taxes in the period in which such determination is made. The provision for income taxes includes the impact of changes to reserves, as well as the related net interest and penalties.
Long-lived Assets	Long-lived Assets The Company reviews all long-lived assets whenever events or changes in circumstance indicate that these assets may not be recoverable. When evaluating long-lived assets, if the Company concludes that the estimated undiscounted cash flows attributable to the assets are less than their carrying value, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their respective fair values, which could adversely affect its results of operations.
Comprehensive Income	Comprehensive Income Comprehensive income is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. The Company's accumulated other comprehensive income consists of cumulative foreign currency translation adjustments. Total comprehensive income is presented in the Condensed Consolidated Statements of Comprehensive Income.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Standards
Concentration of Credit Risk	The Company manages its credit risk associated with exposure to distributors and direct customers on outstanding accounts receivable through the application and review of credit approvals, credit ratings and other monitoring procedures. In some instances, the Company also obtains letters of credit from certain customers. Credit sales, which are mainly on credit terms of 30 to 60 days, are only made to customers who meet the Company's credit requirements, while sales to new customers or customers with low credit ratings are usually made on an advance payment basis. The Company considers its trade accounts receivable to be of good credit quality because its key distributors and direct customers have long-standing business relationships with the Company and the Company has not experienced any significant bad debt write-offs of accounts receivable in the past. The Company closely monitors the aging of accounts receivable from its distributors and direct customers, and regularly reviews their financial positions, where available.

Net Income (Loss) Per Common _2

Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited - (Tables)	3 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents the calculation of basic and diluted net income per share attributable to common shareholders: Three Months Ended September 30, 2023 2022 (in thousands, except per share data) Numerator: Net income $ 5,786 $ 26,038 Denominator: Basic: Weighted average number of common shares used to compute basic net income per share 27,693 27,391 Diluted: Weighted average number of common shares used to compute basic net income per share 27,693 27,391 Effect of potentially dilutive securities: Stock options, RSUs and ESPP shares 2,093 2,032 Weighted average number of common shares used to compute diluted net income per share 29,786 29,423 Net income per share: Basic $ 0.21 $ 0.95 Diluted $ 0.19 $ 0.88
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following potential dilutive securities were excluded from the computation of diluted net income per share as their effect would have been anti-dilutive: Three Months Ended September 30, 2023 2022 (in thousands) Employee stock options and RSUs 63 605 ESPP 170 223 Total potential dilutive securities 233 828

Concentration of Credit Risk _2

Concentration of Credit Risk and Significant Customers (Tables)	3 Months Ended
	Sep. 30, 2023
Risks and Uncertainties [Abstract]
Schedules of Concentration of Risk, by Risk Factor	Summarized below are individual customers whose revenue or accounts receivable balances were 10% or higher than the respective total consolidated amounts: Three Months Ended September 30, Percentage of revenue 2023 2022 Customer A 23.9 % 24.0 % Customer B 46.6 % 38.6 % Customer D * 11.2 % September 30, June 30, Percentage of accounts receivable Customer A 19.3 % 15.3 % Customer B 45.2 % 17.6 % Customer C 11.2 % 13.3 % Customer D * 30.9 %

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Sep. 30, 2023
Balance Sheet Related Disclosures [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	Accounts receivable, net: September 30, June 30, (in thousands) Accounts receivable $ 73,266 $ 62,426 Less: Allowance for price adjustments (38,833) (39,976) Less: Allowance for doubtful accounts (30) (30) Accounts receivable, net $ 34,403 $ 22,420
Schedule of Inventory, Current	Inventories: September 30, June 30, (in thousands) Raw materials $ 89,899 $ 86,620 Work-in-process 72,575 69,426 Finished goods 25,277 27,201 $ 187,751 $ 183,247
Other Current Assets	Other current assets: September 30, June 30, (in thousands) Value-added tax receivable $ 459 $ 275 Other prepaid expenses 4,161 3,863 Prepaid insurance 3,898 4,162 Prepaid maintenance 1,847 1,697 Prepayment to supplier 10,747 10,689 Prepaid income tax 906 707 Interest receivable 374 135 Other receivables 1,601 1,138 $ 23,993 $ 22,666
Property, Plant and Equipment	Property, plant and equipment, net: September 30, June 30, (in thousands) Land $ 4,877 $ 4,877 Building and building improvements 26,834 26,478 Manufacturing machinery and equipment 404,548 398,757 Equipment and tooling 33,774 32,737 Computer equipment and software 50,748 49,890 Office furniture and equipment 3,080 3,087 Leasehold improvements 39,875 38,787 563,736 554,613 Less: accumulated depreciation (284,069) (272,503) 279,667 282,110 Equipment and construction in progress 74,562 75,721 Property, plant and equipment, net $ 354,229 $ 357,831
Intangible Assets Disclosure	Intangible assets, net: September 30, June 30, (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 (13,771) (12,959) 5,684 6,496 Goodwill 269 269 Intangible assets, net $ 5,953 $ 6,765
Schedule Future Amortization Expense of Intangible Assets	Estimated future minimum amortization expense of intangible assets is as follows (in thousands): Year ending June 30, 2024 (Remaining) $ 2,437 2025 3,247 $ 5,684
Schedule of Other Assets, Noncurrent	Other long-term assets: September 30, June 30, (in thousands) Prepayments for property and equipment $ 3,274 $ 1,717 Investment in a privately held company 100 100 Customs deposit 995 931 Deposit with supplier 12,191 12,290 Other long-term deposits 37 37 Office leases deposits 1,391 1,274 Other 3,290 3,354 $ 21,278 $ 19,703
Schedule of Accrued Liabilities	Accrued liabilities: September 30, June 30, (in thousands) Accrued compensation and benefits $ 20,159 $ 15,627 Warranty accrual 2,006 1,674 Stock rotation accrual 5,595 5,588 Accrued professional fees 2,398 2,458 Accrued inventory 1,536 1,597 Accrued facilities related expenses 2,261 2,327 Accrued property, plant and equipment 6,767 6,402 Other accrued expenses 4,176 4,401 Customer deposits 35,646 38,082 ESPP payable 3,404 1,377 $ 83,948 $ 79,533
Schedule of Product Warranty Liability	The activities in the warranty accrual, included in accrued liabilities, are as follows: Three Months Ended September 30, 2023 2022 (in thousands) Beginning balance $ 1,674 $ 2,650 Additions 497 205 Utilization (165) (27) Ending balance $ 2,006 $ 2,828
Stock Rotation Accrual	The activities in the stock rotation accrual, included in accrued liabilities, are as follows: Three Months Ended September 30, 2023 2022 (in thousands) Beginning balance $ 5,588 $ 4,798 Additions 3,008 3,677 Utilization (3,001) (3,765) Ending balance $ 5,595 $ 4,710
Other Long-Term Liabilities	Other long-term liabilities: September 30, June 30, (in thousands) Customer deposits $ 40,393 $ 46,393 Computer software liabilities 3,580 4,644 Other long-term liabilities $ 43,973 $ 51,037

Bank Borrowing (Tables)

Bank Borrowing (Tables)	3 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Schedule of Maturities	Maturities of short-term debt and long-term debt were as follows (in thousands): Year ending June 30, 2024 (Remaining) $ 8,621 2025 11,664 2026 11,871 2027 14,344 2028 536 Total principal 47,036 Less: debt issuance costs (83) Total principal, less debt issuance costs $ 46,953 Short-term Debt Long-term Debt Total Principal amount $ 11,518 $ 35,518 $ 47,036 Less: debt issuance costs (35) (48) (83) Total debt, less debt issuance costs $ 11,483 $ 35,470 $ 46,953

Leases - (Tables)

Leases - (Tables)	3 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Components of Operating and Finance Lease Costs	The components of the Company’s operating and finance lease expenses are as follows for the periods presented (in thousands): Three Months Ended September 30, 2023 2022 Operating leases: Fixed rent expense $ 2,437 $ 1,413 Variable rent expense 252 237 Finance lease: Amortization of equipment 128 137 Interest 75 57 Short-term leases Short-term lease expenses 40 80 Total lease expenses $ 2,932 $ 1,924 Supplemental cash flow information related to the Company’s operating and finance lease is as follows (in thousands): Three Months Ended September 30, 2023 2022 Cash paid from amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,590 $ 1,487 Operating cash flows from finance lease $ 75 $ 57 Financing cash flows from finance lease $ 211 $ 201 Non-cash investing and financing information: Operating lease right-of-use assets obtained in exchange for lease obligations $ 3,588 $ 1,924
Schedule of Lease Assets and Liabilities	Supplemental balance sheets information related to the Company’s operating and finance leases is as follows (in thousands, except lease term and discount rate): September 30, June 30, Operating Leases : ROU assets associated with operating leases $ 26,582 $ 24,349 Finance Lease: Property, plant and equipment, gross $ 5,133 $ 5,133 Accumulated depreciation (786) (657) Property, plant and equipment, net $ 4,347 $ 4,476 Weighted average remaining lease term (in years) Operating leases 6.02 6.57 Finance lease 4.00 4.25 Weighted average discount rate Operating leases 4.92 % 4.67 % Finance lease 7.51 % 7.51 %
Schedule of Operating Lease Future Minimum Lease Payments (Topic 842)	Future minimum lease payments are as follows as of September 30, 2023 (in thousands): Year ending June 30, Operating Leases Finance Leases The remainder of fiscal 2024 $ 4,698 $ 858 2025 5,797 1,144 2026 4,959 1,144 2027 4,073 1,145 2028 3,684 191 Thereafter 8,297 — Total minimum lease payments 31,508 4,482 Less amount representing interest (4,376) (609) Total lease liabilities $ 27,132 $ 3,873
Schedule of Finance Lease Future Minimum Lease Payments (Topic 842)	Future minimum lease payments are as follows as of September 30, 2023 (in thousands): Year ending June 30, Operating Leases Finance Leases The remainder of fiscal 2024 $ 4,698 $ 858 2025 5,797 1,144 2026 4,959 1,144 2027 4,073 1,145 2028 3,684 191 Thereafter 8,297 — Total minimum lease payments 31,508 4,482 Less amount representing interest (4,376) (609) Total lease liabilities $ 27,132 $ 3,873

Shareholders' Equity and Shar_2

Shareholders' Equity and Share-based Compensation (Tables)	3 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Restricted Stock Units Activity	Time-based Restric ted Stock Units ( “ TRSU ” ) The following table summarizes the Company's TRSU activities for the three months ended September 30, 2023: Number of Restricted Stock Weighted Average Weighted Average Aggregate Intrinsic Value Nonvested at June 30, 2023 1,385,065 $ 32.48 1.73 $ 45,430,132 Granted 76,800 $ 32.79 Vested (44,655) $ 31.18 Forfeited (14,501) $ 33.55 Nonvested at September 30, 2023 1,402,709 $ 32.53 1.57 $ 41,856,837 The following table summarizes the Company’s PRSUs activities for the three months ended September 30, 2023: Number of Performance-based Restricted Stock Weighted Average Weighted Average Aggregate Intrinsic Value Nonvested at June 30, 2023 526,714 $ 32.19 1.78 $ 17,276,219 Granted — $ — Vested — $ — Forfeited — $ — Nonvested at September 30, 2023 526,714 $ 32.19 1.52 $ 15,717,146
Summary of Stock Option Activities	The following table summarizes the Company's stock option activities for the three months ended September 30, 2023: Weighted Weighted Average Average Remaining Number of Exercise Price Contractual Aggregate Shares Per Share Term (in years) Intrinsic Value Outstanding at June 30, 2023 319,375 $ 7.53 0.72 $ 8,071,631 Exercised (60,000) $ 7.44 $ 1,342,961 Outstanding at September 30, 2023 259,375 $ 7.55 0.47 $ 5,782,281 Options vested and expected to vest 259,375 $ 7.55 0.47 $ 5,782,281 Exercisable at September 30, 2023 259,375 $ 7.55 0.47 $ 5,782,281
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The assumptions used to estimate the fair values of common shares issued under the ESPP were as follows: Three Months Ended September 30, 2023 Volatility rate 64.0% Risk-free interest rate 4.6% Expected term 1.3 years Dividend yield 0%
Share-based Compensation, Allocation of Recognized Period Costs	Share-based Compensation Expense The total share-based compensation expense recognized in the Condensed Consolidated Statements of Income for the periods presented was as follows: Three Months Ended September 30, 2023 2022 (in thousands) Cost of goods sold $ 212 $ 1,788 Research and development 6 2,494 Selling, general and administrative 700 6,314 $ 918 $ 10,596

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	3 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Disaggregation of Revenue	The Company sells its products primarily to distributors in the Asia Pacific region, who in turn sell these products to end customers. Because the Company’s distributors sell their products to end customers which may have a global presence, revenue by geographical location is not necessarily representative of the geographical distribution of sales to end user markets. In February 2023, the Company entered into a license agreement with a customer to license the Company’s proprietary SiC technology and to provide 24-month engineering and development services for a total fee of $45 million. The revenue by geographical location in the following tables is based on the country or region in which the products were shipped to: Three Months Ended September 30, 2023 2022 (in thousands) Hong Kong $ 141,206 $ 172,296 China 26,619 28,014 South Korea 5,311 2,897 United States 1,395 4,484 Other countries 6,102 785 $ 180,633 $ 208,476 The following is a summary of revenue by product type: Three Months Ended September 30, 2023 2022 (in thousands) Power discrete $ 121,500 $ 144,573 Power IC 52,747 62,320 Packaging and testing services 745 1,583 License and development services 5,641 — $ 180,633 $ 208,476
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	Long-lived assets, net consisting of property, plant and equipment and operating lease right-of-use assets, net by geographical area are as follows: September 30, June 30, (in thousands) China $ 115,168 $ 114,822 United States 261,190 263,083 Other countries 4,453 4,275 $ 380,811 $ 382,180

The Company and Significant A_3

The Company and Significant Accounting Policies - Joint Venture (Details)					3 Months Ended
	Sep. 30, 2023	Dec. 31, 2021	Dec. 02, 2021	Nov. 30, 2021	Sep. 30, 2023	Jan. 26, 2022	Dec. 24, 2021	Dec. 01, 2021
Ownership interest, percent	42.20%				42.20%
Joint Venture
Ownership interest, percent			48.80%	50.90%
Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') | Joint Venture | Third Party Investor
Ownership interest sold, percent						7.82%	1.10%
Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') | Joint Venture | Employee Incentive Plan | Employee Incentive Plan
Ownership interest sold, percent							3.99%
Third Party Investor | Joint Venture | Third Party Investor
Ownership interest sold, percent							1.10%	2.10%
Third Party Investor | Joint Venture | Employee Incentive Plan | Employee Incentive Plan
Ownership interest sold, percent							3.99%
Chongqing Funds | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
Ownership interest, percent		45.80%

The Company and Significant A_4

The Company and Significant Accounting Policies - Revenue (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2023	Mar. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Feb. 28, 2023
Revenues from External Customers and Long-Lived Assets
Remaining performance obligation						$ 45,000
Revenue			$ 180,633	$ 208,476
Proceeds from upfront fees	$ 6,800	$ 18,000
License and development services
Revenues from External Customers and Long-Lived Assets
Revenue			$ 5,641	$ 0	$ 15,600

The Company and Significant A_5

The Company and Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023
Accounting Policies [Abstract]
Restricted cash	$ 0.2	$ 0.4

The Company and Significant A_6

The Company and Significant Accounting Policies - Government Grants (Details) $ in Millions	3 Months Ended
	Sep. 30, 2022 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Government Grants, Reduction Recorded To Property, Plant And Equipment and Operating Expenses	$ 0.3

Equity Method Investment in E_2

Equity Method Investment in Equity Investee - Narrative (Details) $ in Thousands, ¥ in Millions							3 Months Ended
	Sep. 30, 2023	Jan. 26, 2022 USD ($)	Jan. 26, 2022 CNY (¥)	Dec. 31, 2021	Dec. 02, 2021 director	Nov. 30, 2021 director	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 24, 2021
Schedule of Equity Method Investments [Line Items]
Ownership interest, percent	42.20%						42.20%
Number of appointments to board of directors					3	4
Number of directors on Board					7
Equity method investment income (loss) from equity investee | $							$ (2,712)	$ 2,502
Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') | Chongqing Funds
Schedule of Equity Method Investments [Line Items]
Ownership interest, percent				45.80%
Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership interest, percent					48.80%	50.90%
Third Party Investor | Joint Venture
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity interest in the JV Company		$ 80,000	¥ 509
Third Party Investor | Joint Venture | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
Schedule of Equity Method Investments [Line Items]
Ownership interest sold, percent		7.82%	7.82%						1.10%
Employee Incentive Plan | Joint Venture | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') | Employee Incentive Plan
Schedule of Equity Method Investments [Line Items]
Ownership interest sold, percent									3.99%

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands				3 Months Ended
	Sep. 30, 2023	Dec. 02, 2021	Nov. 30, 2021	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023
Related Party Transaction [Line Items]
Ownership interest, percent	42.20%			42.20%
Revenue				$ 180,633	$ 208,476
Joint Venture
Related Party Transaction [Line Items]
Ownership interest, percent		48.80%	50.90%
Purchases from related party				29,800	46,100
Joint Venture | Supplies, Assembly And Testing Services
Related Party Transaction [Line Items]
Revenue				800	$ 16,600
Related Party
Related Party Transaction [Line Items]
Accounts payable	$ 20,115			$ 20,115		$ 11,950

Net Income (Loss) Per Common _3

Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited - Basic and Diluted Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net income	$ 5,786	$ 26,038
Basic:
Weighted average number of common shares used to compute basic net income per share	27,693	27,391
Effect of potentially dilutive securities:
Stock options, RSUs and ESPP shares	2,093	2,032
Weighted average number of common shares used to compute diluted net income per share	29,786	29,423
Net income per share:
Basic (in dollars per share)	$ 0.21	$ 0.95
Diluted (in dollars per share)	$ 0.19	$ 0.88

Net Income (Loss) Per Common _4

Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited - Potential Dilutive Shares (Details) - shares shares in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive securities (in shares)	233	828
Employee stock options and RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive securities (in shares)	63	605
ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive securities (in shares)	170	223

Concentration of Credit Risk _3

Concentration of Credit Risk and Significant Customers - (Details)		3 Months Ended
	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Customer Concentration Risk | Customer A | Revenue
Concentration Risk
Customers greater than 10% of total		23.90%	24%
Customer Concentration Risk | Customer A | Accounts Receivable
Concentration Risk
Customers greater than 10% of total	15.30%	19.30%
Customer Concentration Risk | Customer B | Revenue
Concentration Risk
Customers greater than 10% of total		46.60%	38.60%
Customer Concentration Risk | Customer B | Accounts Receivable
Concentration Risk
Customers greater than 10% of total	17.60%	45.20%
Customer Concentration Risk | Customer C | Revenue
Concentration Risk
Customers greater than 10% of total			11.20%
Customer Concentration Risk | Customer C | Accounts Receivable
Concentration Risk
Customers greater than 10% of total	13.30%	11.20%
Customer Concentration Risk | Customer D | Accounts Receivable
Concentration Risk
Customers greater than 10% of total	30.90%
Minimum
Concentration Risk
Terms of credit sales, (in days)		30 days
Maximum
Concentration Risk
Terms of credit sales, (in days)		60 days

Balance Sheet Components - Acco

Balance Sheet Components - Accounts receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Balance Sheet Related Disclosures [Abstract]
Accounts receivable	$ 73,266	$ 62,426
Less: Allowance for price adjustments	(38,833)	(39,976)
Less: Allowance for doubtful accounts	(30)	(30)
Accounts receivable, net	$ 34,403	$ 22,420

Balance Sheet Components - Inve

Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 89,899	$ 86,620
Work-in-process	72,575	69,426
Finished goods	25,277	27,201
Inventory, net	$ 187,751	$ 183,247

Balance Sheet Components - Othe

Balance Sheet Components - Other current assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Balance Sheet Related Disclosures [Abstract]
Value-added tax receivable	$ 459	$ 275
Other prepaid expenses	4,161	3,863
Prepaid insurance	3,898	4,162
Prepaid maintenance	1,847	1,697
Prepayment to supplier	10,747	10,689
Prepaid income tax	906	707
Interest Receivable, Current	374	135
Other receivables	1,601	1,138
Other Assets, Current	$ 23,993	$ 22,666

Balance Sheet Components - Prop

Balance Sheet Components - Property, plant, and equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	$ 563,736	$ 554,613
Less: accumulated depreciation	(284,069)	(272,503)
Property, plant and equipment excluding equipment and construction in progress, net	279,667	282,110
Equipment and construction in progress	74,562	75,721
Property, plant and equipment, net	354,229	357,831
Land
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	4,877	4,877
Building and building improvements
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	26,834	26,478
Manufacturing machinery and equipment
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	404,548	398,757
Equipment and tooling
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	33,774	32,737
Computer equipment and software
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	50,748	49,890
Office furniture and equipment
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	3,080	3,087
Leasehold improvements
Property, Plant and Equipment
Property, plant, and equipment excluding equipment and construction In progress, gross	$ 39,875	$ 38,787

Balance Sheet Components - Inta

Balance Sheet Components - Intangible assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Schedule of Finite-lived Intangible Assets and Goodwill
Finite-Lived Intangible Assets, Gross	$ 19,455	$ 19,455
Less: accumulated amortization	(13,771)	(12,959)
Total intangible assets	5,684	6,496
Goodwill	269	269
Intangible assets, net	5,953	6,765
Patents and technology rights
Schedule of Finite-lived Intangible Assets and Goodwill
Finite-Lived Intangible Assets, Gross	18,037	18,037
Trade name
Schedule of Finite-lived Intangible Assets and Goodwill
Finite-Lived Intangible Assets, Gross	268	268
Customer relationships
Schedule of Finite-lived Intangible Assets and Goodwill
Finite-Lived Intangible Assets, Gross	$ 1,150	$ 1,150

Balance Sheet Components - Futu

Balance Sheet Components - Future Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Balance Sheet Related Disclosures [Abstract]
2024 (Remaining)	$ 2,437
2024	3,247
Total intangible assets	$ 5,684	$ 6,496

Balance Sheet Components - Ot_2

Balance Sheet Components - Other long term assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Balance Sheet Related Disclosures [Abstract]
Prepayments for property and equipment	$ 3,274	$ 1,717
Investment in a privately held company	100	100
Customs deposit	995	931
Deposit with supplier	12,191	12,290
Other long-term deposits	37	37
Office leases deposits	1,391	1,274
Other	3,290	3,354
Other long-term assets	$ 21,278	$ 19,703

Balance Sheet Components - Accr

Balance Sheet Components - Accrued liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
Accrued Liabilities
Accrued compensation and benefits	$ 20,159	$ 15,627
Warranty accrual	2,006	1,674	$ 2,828	$ 2,650
Stock rotation accrual	5,595	5,588	$ 4,710	$ 4,798
Accrued professional fees	2,398	2,458
Accrued inventory	1,536	1,597
Accrued facilities related expenses	2,261	2,327
Accrued property, plant and equipment	6,767	6,402
Other accrued expenses	4,176	4,401
Customer deposits	35,646	38,082
ESPP payable	3,404	1,377
Accrued liabilities	83,948	79,533
Customer A
Accrued Liabilities
Customer deposits	12,500	13,500
Customer B
Accrued Liabilities
Customer deposits	9,200	9,200
Other Customer
Accrued Liabilities
Customer deposits	$ 14,000	$ 15,400

Balance Sheet Components - Prod

Balance Sheet Components - Product Warranty Accrual (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease)
Beginning balance	$ 1,674	$ 2,650
Additions	497	205
Utilization	(165)	(27)
Ending balance	$ 2,006	$ 2,828

Balance Sheet Components - Stoc

Balance Sheet Components - Stock Rotation Accrual (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Stock Rotation Accrual Increase (Decrease)
Beginning balance	$ 5,588	$ 4,798
Additions	3,008	3,677
Utilization	(3,001)	(3,765)
Ending balance	$ 5,595	$ 4,710

Balance Sheet Components - Ot_3

Balance Sheet Components - Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Concentration Risk
Customer deposits	$ 40,393	$ 46,393
Computer software liabilities	3,580	4,644
Other long-term liabilities	43,973	51,037
Customer A
Concentration Risk
Customer deposits	17,000	21,000
Customer B
Concentration Risk
Customer deposits	10,700	11,700
Other Customers
Concentration Risk
Customer deposits	$ 12,700	$ 13,700

Bank Borrowing - Narrative (Det

Bank Borrowing - Narrative (Details) € in Millions

1 Months Ended

3 Months Ended

Feb. 16, 2022 USD ($)

Aug. 18, 2021 USD ($)

Aug. 09, 2019 USD ($)

Sep. 30, 2022 USD ($)

Sep. 30, 2023 USD ($)

Sep. 30, 2023 CNY (¥)

Sep. 30, 2023 EUR (€)

Jun. 30, 2023 USD ($)

Jan. 31, 2023 USD ($)

Jan. 31, 2023 CNY (¥)

Sep. 20, 2022 USD ($)

Sep. 20, 2022 CNY (¥)

Jun. 30, 2022 USD ($)

Aug. 11, 2021 USD ($)

Apr. 30, 2021 EUR (€)

Debt Instrument [Line Items]

Lease completion buyout option, amount

$ 1

Long-term debt

$ 35,470,000

$ 38,360,000

Jireh Semiconductor Incorporated | Sales-Lease Back Transaction with Jireh Semiconductor Incorporated

Debt Instrument [Line Items]

Debt financing term (in years)

5 years

Implied interest rate

7.51%

4.75%

Historical cost | €

€ 12

Down payment amount | €

€ 6

Down payment percent

50%

50%

Delivery payment, percent

40%

Delivery payment, amount

$ 4,800,000

Purchase price financing, percent

10%

Payments for purchase of optional hardware

$ 200,000

Outstanding balance

$ 11,000,000

Jireh Semiconductor Incorporated | Sales-Lease Back Transaction with Jireh Semiconductor Incorporated | Manufacturing machinery and equipment

Debt Instrument [Line Items]

Collateral amount

14,800,000

Secured Debt | Accounts Receivable Factoring Agreement August 9 2019

Debt Instrument [Line Items]

Accounts Receivable Factoring Agreement, Reduction Of Maximum Borrowing Capacity

$ 8,000,000

Secured Debt | Jireh

Debt Instrument [Line Items]

Line of credit facility, maximum borrowing capacity

$ 45,000,000

Debt instrument, term

5 years 6 months

Amount outstanding

36,000,000

Proceeds from lines of credit

$ 45,000,000

Bank Of Communications Limited | Line of Credit | Line Of Credit Maturing December 1 2023

Debt Instrument [Line Items]

Line of credit facility, maximum borrowing capacity

$ 20,600,000

¥ 140,000,000

Long-Term Line of Credit

0

Hongkong And Shanghai Banking Corporation Limited | Secured Debt | Accounts Receivable Factoring Agreement August 9 2019

Debt Instrument [Line Items]

Basis spread on variable rate

1.75%

Accounts receivable factoring agreement, maximum borrowing capacity, percent of net accounts receivable

70%

Accounts receivable factoring agreement, maximum borrowing capacity

$ 30,000,000

Accounts receivable factoring agreement, remaining borrowing capacity

8,000,000

Accounts receivable factoring agreement, borrowed amount outstanding

0

Industrial And Commercial Bank of China | Foreign Line of Credit

Debt Instrument [Line Items]

Loan agreements, short-term debt

$ 10,300,000

¥ 72,000,000

China Construction Bank | Line of Credit | Line Of Credit Maturing Septmeber 2025

Debt Instrument [Line Items]

Line of credit facility, maximum borrowing capacity

6,800,000

¥ 50,000,000

Long-Term Line of Credit

$ 0

Bank Borrowing - Schedule of De

Bank Borrowing - Schedule of Debt Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Debt Disclosure [Abstract]
2023 (Remaining)	$ 8,621
2024	11,664
2025	11,871
2026	14,344
2027	536
Total principal, less debt issuance costs	47,036
Less: debt issuance costs	(83)
Debt, Long-Term And Short-Term, Combined Amount, Net	46,953
Short-term Debt [Abstract]
Principal amount	11,518
Less: debt issuance costs	(35)
Total debt, less debt issuance costs	11,483
Long-term Debt, Unclassified [Abstract]
Principal amount	35,518
Less: debt issuance costs	(48)
Total debt, less debt issuance costs	$ 35,470	$ 38,360

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Debt Instrument [Line Items]
Operating lease liability	$ 27,132
ROU assets associated with operating leases	26,582	$ 24,349
Property, plant and equipment, gross	$ 5,133	$ 5,133

Leases - Schedule of Operating

Leases - Schedule of Operating and Finance Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating leases:
Fixed rent expense	$ 2,437	$ 1,413
Variable rent expense	252	237
Finance lease:
Amortization of equipment	128	137
Interest	75	57
Short-term leases
Short-term lease expenses	40	80
Total lease expenses	$ 2,932	$ 1,924

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Operating Leases:
ROU assets associated with operating leases	$ 26,582	$ 24,349
Finance Lease:
Property, plant and equipment, gross	5,133	5,133
Accumulated depreciation	(786)	(657)
Property, plant and equipment, net	$ 4,347	$ 4,476
Weighted average remaining lease term (in years)
Operating leases	6 years 7 days	6 years 6 months 25 days
Finance lease	4 years	4 years 3 months
Weighted average discount rate
Operating leases	4.92%	4.67%
Finance lease	7.51%	7.51%

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash paid from amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,590	$ 1,487
Operating cash flows from finance lease	75	57
Financing cash flows from finance lease	211	201
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 3,588	$ 1,924

Leases - Future Minimum Lease P

Leases - Future Minimum Lease Payments (Topic 842) (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Operating Leases
The remainder of fiscal 2024	$ 4,698
2024	5,797
2025	4,959
2026	4,073
2027	3,684
Thereafter	8,297
Total minimum lease payments	31,508
Less amount representing interest	(4,376)
Total Operating Lease Liability	27,132
Finance Leases
The remainder of fiscal 2024	858
2024	1,144
2025	1,144
2026	1,145
2027	191
Thereafter	0
Total minimum lease payments	4,482
Less amount representing interest	(609)
Total Finance Lease Liability	$ 3,873

Shareholders' Equity and Shar_3

Shareholders' Equity and Share-based Compensation - Shares Repurchase (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		155 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2017
Class of Stock [Line Items]
Treasury Stock, Shares, Retired			0
Share repurchase program, authorized amount (USD in Millions)				$ 30,000
Repurchase of common shares under shares repurchase program			7,332,780
Treasury stock acquired, average price per share (in dollars per share)			$ 11.01
Treasury Stock, Value, Acquired, Cost Method			$ (81,100)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Share-based compensation expense	$ 918	$ 10,596
Treasury Stock Reissued
Class of Stock [Line Items]
Treasury stock acquired, average price per share (in dollars per share)			$ 9.97
Shares reissued (in shares)			175,599
Shares reissued, average price (in dollars per share)			$ 4.76
2018 Market-based Restricted Stock Units (MSU)
Class of Stock [Line Items]
Share-based compensation expense	$ 300	$ 600

Shareholders' Equity and Shar_4

Shareholders' Equity and Share-based Compensation - Time-based Restricted Stock Activity (Details)		3 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average remaining recognition period (in years)		2 years 8 months 12 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at beginning of period (in shares) | shares		1,385,065
Granted (in shares) | shares		76,800
Vested (in shares) | shares		(44,655)
Forfeited (in shares) | shares		(14,501)
Nonvested at end of period (in shares) | shares	1,385,065	1,402,709
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested at beginning of period (in dollars per share) | $ / shares		$ 32.48
Granted (in dollars per share) | $ / shares		32.79
Vested (in dollars per share) | $ / shares		31.18
Forfeited (in dollars per share) | $ / shares		33.55
Nonvested at end of period (in dollars per share | $ / shares	$ 32.48	$ 32.53
Weighted average remaining recognition period (in years)	1 year 8 months 23 days	1 year 6 months 25 days
Aggregate Intrinsic Value | $	$ 45,430,132	$ 41,856,837

Shareholders' Equity and Shar_5

Shareholders' Equity and Share-based Compensation - Market-based Restricted Stock Units Narrative (Details) - USD ($)				1 Months Ended	3 Months Ended
	Sep. 30, 2023	Sep. 19, 2023	Jun. 30, 2023	Dec. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					$ 918,000	$ 10,596,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average remaining recognition period (in years)					2 years 8 months 12 days
Revision of Prior Period, Adjustment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					$ (6,400,000)
Scenario, Adjustment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					(6,300,000)
2021 Market-based Restricted Stock Units (MSU)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)				1,000,000
2018 Market-based Restricted Stock Units (MSU)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					$ 300,000	$ 600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)							1,300,000
Market-based Restricted Stock Units (MSU)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate		4.94%
Expected term		2 years 3 months 10 days
Dividend yield		0%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at beginning of period (in shares)					2,108,000
Granted (in shares)					0
Vested (in shares)					0
Forfeited (in shares)					0
Nonvested at end of period (in shares)	2,108,000		2,108,000		2,108,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested at beginning of period (in dollars per share)					$ 25.86
Granted (in dollars per share)					0
Vested (in dollars per share)					0
Forfeited (in dollars per share)					0
Nonvested at end of period (in dollars per share	$ 25.86		$ 25.86		$ 25.86
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate		61.38%
Weighted average remaining recognition period (in years)	3 years 2 months 4 days		2 years 11 months 15 days
Aggregate Intrinsic Value	$ 62,902,720		$ 69,142,400		$ 62,902,720
Market-based Restricted Stock Units (MSU) | Revision of Prior Period, Adjustment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense					$ (2,000,000)
Market-based Restricted Stock Units (MSU) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		4 years

Shareholders' Equity and Shar_6

Shareholders' Equity and Share-based Compensation - Performance-based Restricted Stock Units (Details) - USD ($)			3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$ 918,000	$ 10,596,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average remaining recognition period (in years)			2 years 8 months 12 days
Performance Based Restricted Stock Units (PRSUs) Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$ 400,000	$ 1,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at beginning of period (in shares)			526,714
Granted (in shares)			0
Vested (in shares)			0
Forfeited (in shares)			0
Nonvested at end of period (in shares)	526,714	526,714	526,714
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested at beginning of period (in dollars per share)			$ 32.19
Granted (in dollars per share)			0
Vested (in dollars per share)			0
Forfeited (in dollars per share)			0
Nonvested at end of period (in dollars per share	$ 32.19	$ 32.19	$ 32.19
Weighted average remaining recognition period (in years)	1 year 6 months 7 days	1 year 9 months 10 days
Aggregate Intrinsic Value	$ 15,717,146	$ 17,276,219	$ 15,717,146

Shareholders' Equity and Shar_7

Shareholders' Equity and Share-based Compensation - Stock Options Outstanding and Exercisable (Details) - USD ($)		3 Months Ended
	Jun. 30, 2023	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)		319,375
Exercised (in shares)		(60,000)
Outstanding at end of period (In shares)	319,375	259,375
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 1,342,961
Options vested and expected to vest (in shares)		259,375
Exercisable at end of period (in shares)		259,375
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)		$ 7.53
Exercised (in dollars per share)		7.44
Outstanding at end of period (in dollars per share)	$ 7.53	7.55
Options vested and expected to vest (in dollars per share)		7.55
Exercisable at end of period (in dollars per share)		$ 7.55
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, Weighted-Average Remaining Contractual Life (in years)	8 months 19 days	5 months 19 days
Options vested and expected to vest, Weighted Average Remaining Contractual Life (in years)		5 months 19 days
Exercisable at end of period, Weighted Average Remaining Contractual Life (in years)		5 months 19 days
Options outstanding, Aggregate Intrinsic Value	$ 8,071,631	$ 5,782,281
Options vested and expected to vest, Aggregate Intrinsic Value		5,782,281
Exercisable at end of period, Aggregate Intrinsic Value		$ 5,782,281

Shareholders' Equity and Shar_8

Shareholders' Equity and Share-based Compensation - Employee Share Purchase Plan (Details) - shares	3 Months Ended	155 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common shares under shares repurchase program		7,332,780
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility rate	64%
Risk-free interest rate	4.60%
Expected term	1 year 3 months 18 days
Dividend yield	0%

Shareholders' Equity and Shar_9

Shareholders' Equity and Share-based Compensation - Share-based Compensation (Details) - USD ($)		3 Months Ended			155 Months Ended
	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2018	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 918,000	$ 10,596,000
Repurchase of common shares under shares repurchase program					7,332,780
Options outstanding, Weighted-Average Remaining Contractual Life (in years)	8 months 19 days	5 months 19 days
Options vested and expected to vest (in shares)		259,375			259,375
Options vested and expected to vest (in dollars per share)		$ 7.55			$ 7.55
Options vested and expected to vest, Weighted Average Remaining Contractual Life (in years)		5 months 19 days
Options vested and expected to vest, Aggregate Intrinsic Value		$ 5,782,281			$ 5,782,281
Exercisable at end of period (in shares)		259,375			259,375
Exercisable at end of period (in dollars per share)		$ 7.55			$ 7.55
Exercisable at end of period, Weighted Average Remaining Contractual Life (in years)		5 months 19 days
Exercisable at end of period, Aggregate Intrinsic Value		$ 5,782,281			$ 5,782,281
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)		319,375
Outstanding at end of period (In shares)	319,375	259,375			259,375
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)		$ 7.53
Outstanding at end of period (in dollars per share)	$ 7.53	$ 7.55			$ 7.55
Options outstanding, Aggregate Intrinsic Value	$ 8,071,631	$ 5,782,281			$ 5,782,281
2018 Market-based Restricted Stock Units (MSU)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		300,000	600,000
Granted (in shares)				1,300,000
Performance Based Restricted Stock Units (PRSUs) Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 400,000	$ 1,600,000
Granted (in shares)		0

Shareholders' Equity and Sha_10

Shareholders' Equity and Share-based Compensation - Share-based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 918	$ 10,596
Unrecognized compensation expense	$ 53,200
Recognition period of share-based compensation expense (in years)	2 years 8 months 12 days
Cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 212	1,788
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	6	2,494
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 700	$ 6,314

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense	$ 1,138	$ 1,374
Discrete income tax expense	50	70
Income tax expense net of discrete tax expense	$ 1,100	$ 1,300
Estimated effective income tax rate excluding discrete income tax expense	15.70%	4.80%
Unrecognized tax benefits	$ 9,400
Unrecognized tax benefit that would impact effective tax rate	$ 6,300

Segment and Geographic Inform_3

Segment and Geographic Information - Narratives (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Feb. 28, 2023 USD ($)	Sep. 30, 2023 USD ($) Segment	Sep. 30, 2022 USD ($)
Segment Reporting [Abstract]
Number of operating segments | Segment		1
Number of reportable segments | Segment		1
Revenues from External Customers and Long-Lived Assets
Revenue | $		$ 180,633	$ 208,476
Service
Revenues from External Customers and Long-Lived Assets
Revenue | $	$ 45,000

Segment and Geographic Inform_4

Segment and Geographic Information - Revenue by Location and Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023
Revenues from External Customers and Long-Lived Assets
Revenue	$ 180,633	$ 208,476
Power discrete
Revenues from External Customers and Long-Lived Assets
Revenue	121,500	144,573
Power IC
Revenues from External Customers and Long-Lived Assets
Revenue	52,747	62,320
Packaging and testing services
Revenues from External Customers and Long-Lived Assets
Revenue	745	1,583
License and development services
Revenues from External Customers and Long-Lived Assets
Revenue	5,641	0	$ 15,600
Hong Kong
Revenues from External Customers and Long-Lived Assets
Revenue	141,206	172,296
China
Revenues from External Customers and Long-Lived Assets
Revenue	26,619	28,014
South Korea
Revenues from External Customers and Long-Lived Assets
Revenue	5,311	2,897
United States
Revenues from External Customers and Long-Lived Assets
Revenue	1,395	4,484
Other countries
Revenues from External Customers and Long-Lived Assets
Revenue	$ 6,102	$ 785

Segment and Geographic Inform_5

Segment and Geographic Information - Long-lived Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Revenues from External Customers and Long-Lived Assets
Property, plant and equipment, net and land use rights, net	$ 380,811	$ 382,180
China
Revenues from External Customers and Long-Lived Assets
Property, plant and equipment, net and land use rights, net	115,168	114,822
United States
Revenues from External Customers and Long-Lived Assets
Property, plant and equipment, net and land use rights, net	261,190	263,083
Other countries
Revenues from External Customers and Long-Lived Assets
Property, plant and equipment, net and land use rights, net	$ 4,453	$ 4,275

Commitments and Contingencies -

Commitments and Contingencies - Purchase Commitments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023
Raw materials, wafers, and packaging and testing services puchase commitments
Purchase Commitment, Excluding Long-term Committment [Line Items]
Purchase commitment, amount	$ 107.9	$ 127.5
Property and equipment purchase commitments
Purchase Commitment, Excluding Long-term Committment [Line Items]
Purchase commitment, amount	$ 13.9	$ 9.7

Commitments and Contingencies_2

Commitments and Contingencies - Contingencies and Indemnities (Details) - USD ($)	Sep. 30, 2023	Jun. 30, 2023
Indemnification Agreement
Loss Contingencies [Line Items]
Indemnifications accrual	$ 0	$ 0