Business and Basis of Presentation (Policies)	6 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements reflect all adjustments of a normal and recurring nature that are necessary for a fair presentation of the results for the interim period ended September 30, 2022, but are not necessarily indicative of the results that will be reported for the entire fiscal year or any other interim period. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) have been condensed or omitted. The aforementioned unaudited condensed consolidated financial statements are prepared in conformity with GAAP and in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission. The interim information should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2022. The consolidated balance sheet as of March 31, 2022 is derived from those audited financial statements.
Reclassifications	Certain reclassifications have been made to prior year amounts to conform to the current year presentation.
Accounting Standard Adopted and Recently Issued Accounting Standards under Evaluation	Accounting Standard Adopted Effective April 1, 2022, the Company adopted ASU 2016-02, Leases (Topic 842), which requires lessees to recognize a right-of-use (“ROU”) asset and a lease liability on their balance sheet for all leases, including operating leases, with a term of greater than 12 months. In July 2018, the Financial Accounting Standards Board (“FASB”) issued ASU 2018-11, which adds a transition option permitting entities to apply the provisions of the new standard at its adoption date instead of the earliest comparative period presented in the consolidated financial statements. Under this transition option, comparative reporting would not be required, and the provisions of the standard would be applied prospectively to leases in effect at the date of adoption. The Company elected to use the optional transition method provided by ASU 2018-11. The Company also elected the package of practical expedients permitted under the transition guidance within the new standard, which allowed the Company to carry forward its ASC 840 assessment regarding definition of a lease, lease classification, and initial direct costs. The following practical expedients were applied implementing this standard. •We did not reassess whether any expired or existing contracts are, or contain, leases. Additionally, we did not reassess for lease classifications of expired or existing leases, or initial direct costs for any existing leases. •We elected the short-term lease exception, which allows us to account for leases with a lease term of twelve months or less similar to existing operating leases. The cost of these leases is disclosed, but is not recognized in the ROU asset and lease liability balances. Consistent with ASC 842 requirements, leases that are one month or less are not included in the disclosures. Operating lease ROU assets represent the Company’s right to use the underlying asset during the lease term and operating lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using incremental borrowing rate at the lease commencement date. The Company chose the practical expedients and reviewed the lease and non-lease components for any impairment or otherwise, subsequently determining that no cumulative-effect adjustment to equity was necessary as part of implementing the modified retrospective approach for its adoption of ASC 842. Operating lease expense, which is comprised of amortization of the ROU asset and the interest accreted on the lease liability, is recognized on a straight-line basis over the lease term and is recorded in lease expense in the condensed consolidated statements of income. Recently Issued Accounting Standards under Evaluation Debt - In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40), Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, to address the complexity in accounting for certain financial instruments with characteristics of liabilities and equity. Among other provisions, the amendments in this ASU significantly change the guidance on the issuer’s accounting for convertible instruments and the guidance on the derivative scope exception for contracts in an entity’s own equity such that fewer conversion features will require separate recognition, and fewer freestanding instruments, like warrants, will require liability treatment. ASU 2020-06 is effective for fiscal years beginning after December 15, 2021. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements. Financial Instruments - FASB ASU 2020-03, Codification Improvements to Financial Instruments, makes clear the determination of the contractual life of a net investment in leases in estimating expected credit losses under ASC 326, Financial Instruments – Credit Losses. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. ASU 2016-13 is effective for the Company in 2023. Early adoption is permitted. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements. Income Tax - In December 2019, the FASB issued ASU 2019-12, which modifies ASC 740 to simplify the accounting for income taxes. The ASU’s amendments are based on changes that were suggested by stakeholders as part of the FASB’s initiative to reduce the complexity of accounting standards while maintaining or enhancing the helpfulness of information provided to financial statement users. ASU 2019-12 is effective for fiscal years beginning after December 15, 2022. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements.
Revenue Recognition	The Company derives its revenues primarily through the sale and delivery of promised goods and services to distributors and end-users in various sectors such as, but not limited to, the gaming, industrial, IT, and consumer products industries. The Company disaggregates revenue based on the following contract types: •Commercial Product and Service contracts including sales of high-powered GaN-based products manufactured utilizing the Company’s proprietary and patented epiwafer technology and wafer fabrication and other assembly processes, sales of GaN epiwafers for the radio frequency (“RF”) and power markets, as well as enabling EPI wafer growth services and products to our strategic partners. •Government contracts for research and development related services and activities. •Licensing contracts including sales of licenses to use such patented proprietary technology. The Company follows a five-step approach for recognizing revenue, consisting of the following: (1) identifying the contract with a customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations in the contract; and (5) recognizing revenue when, or as, the entity satisfies a performance obligation. Sales and other taxes the Company collects concurrent with revenue-producing activities are excluded from revenue. Incidental items that are immaterial in the context of the contract are recognized as expense. The Company does not have any significant financing components associated with its revenue contracts, as payment is received at or shortly after the point of sale. Commercial Product and Service contracts Performance obligations are satisfied, and revenue is recognized when control of a good or service promised in a contract is transferred to a customer using relative standalone selling prices. Control is obtained when a customer has the ability to direct the use of and obtain substantially all of the remaining benefits from that good or service at a point in time, and in an amount that reflects the consideration it expects to be entitled to, in exchange for those products or services. The majority of the Company's revenue under commercial product and service contracts is derived from product sales. Revenue is recognized over-time if the customer receives the benefits as the Company performs work, if the customer controls the asset as it is being produced (continuous transfer of control), or if the product being produced for the customer has no alternative use and we have a contractual right to payment for performance to date. The Company recognizes revenue ratably over-time under the cooperation and development agreement with Yaskawa Electric Corporation (“Yaskawa”). Sales of products or services typically do not include more than one performance obligation. A portion of the Company’s products are sold through distributors. Distributors stock inventory and sell the Company’s products to their own customer base. The Company recognizes revenue upon shipment of its products to its distributors. Master supply or distributor agreements are in place with many of the Company's customers and contain terms and conditions including, but not limited to, payment, delivery, incentives and warranty. These agreements sometimes require minimum purchase commitments. If a master supply, distributor or other similar agreement is not in place with a customer, the Company considers a purchase order, which is governed by the Company’s standard terms and conditions, to be the contract governing the relationship with that customer. Pricing terms are negotiated independently on a stand-alone basis. Revenue is measured based on the amount of net consideration to which the Company expects to be entitled to receive in exchange for products or services. Government contracts Government contract revenues are principally generated under research and development contracts with agencies of the U.S. government. Performance obligations under government contracts are satisfied over-time as customer receives the benefits as the Company performs work, the customer controls the asset as it is being produced (continuous transfer of control), and the Company has a contractual right to payment for performance to date. Licensing contracts From time to time, the Company may enter into licensing arrangements related to its intellectual property. Revenue from licensing arrangements is recognized when earned and estimable. The timing of revenue recognition is dependent on the terms of each license agreement. Generally, the Company will recognize non-refundable upfront licensing fees related to patent licenses immediately upon receipt of the funds if the Company has no significant future obligations to perform under the arrangement. In the case that the arrangement gives rise to variable consideration in the form of milestone and royalty payments, the Company evaluates the royalties to determine if they qualify for the sales and usage-based royalty exception. In the case of the Company’s royalty arrangement with Nexperia, the Company determined the royalties qualify for the sales and usage-based royalty exception, as the license of intellectual property is the predominant item to which the royalty relates and are recognized upon the subsequent sale occurring. The variable amounts are recognized at the net consideration the Company expects to receive upon satisfaction of contractually agreed upon development targets and sales volumes.

Business and Basis of Presentation (Policies)

6 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying unaudited condensed consolidated financial statements reflect all adjustments of a normal and recurring nature that are necessary for a fair presentation of the results for the interim period ended September 30, 2022, but are not necessarily indicative of the results that will be reported for the entire fiscal year or any other interim period. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) have been condensed or omitted. The aforementioned unaudited condensed consolidated financial statements are prepared in conformity with GAAP and in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission. The interim information should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2022. The consolidated balance sheet as of March 31, 2022 is derived from those audited financial statements.

Reclassifications

Certain reclassifications have been made to prior year amounts to conform to the current year presentation.

Accounting Standard Adopted and Recently Issued Accounting Standards under Evaluation

Accounting Standard Adopted

Effective April 1, 2022, the Company adopted ASU 2016-02, Leases (Topic 842), which requires lessees to recognize a right-of-use (“ROU”) asset and a lease liability on their balance sheet for all leases, including operating leases, with a term of greater than 12 months. In July 2018, the Financial Accounting Standards Board (“FASB”) issued ASU 2018-11, which adds a transition option permitting entities to apply the provisions of the new standard at its adoption date instead of the earliest comparative period presented in the consolidated financial statements. Under this transition option, comparative reporting would not be required, and the provisions of the standard would be applied prospectively to leases in effect at the date of adoption. The Company elected to use the optional transition method provided by ASU 2018-11. The Company also elected the package of practical expedients permitted under the transition guidance within the new standard, which allowed the Company to carry forward its ASC 840 assessment regarding definition of a lease, lease classification, and initial direct costs. The following practical expedients were applied implementing this standard.

•We did not reassess whether any expired or existing contracts are, or contain, leases. Additionally, we did not reassess for lease classifications of expired or existing leases, or initial direct costs for any existing leases.

•We elected the short-term lease exception, which allows us to account for leases with a lease term of twelve months or less similar to existing operating leases. The cost of these leases is disclosed, but is not recognized in the ROU asset and lease liability balances. Consistent with ASC 842 requirements, leases that are one month or less are not included in the disclosures.

Operating lease ROU assets represent the Company’s right to use the underlying asset during the lease term and operating lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using incremental borrowing rate at the lease commencement date. The Company chose the practical expedients and reviewed the lease and non-lease components for any impairment or otherwise, subsequently determining that no cumulative-effect adjustment to equity was necessary as part of implementing the modified retrospective approach for its adoption of ASC 842. Operating lease expense, which is comprised of amortization of the ROU asset and the interest accreted on the lease liability, is recognized on a straight-line basis over the lease term and is recorded in lease expense in the condensed consolidated statements of income.

Recently Issued Accounting Standards under Evaluation

Debt - In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40), Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, to address the complexity in accounting for certain financial instruments with characteristics of liabilities and equity. Among other provisions, the amendments in this ASU significantly change the guidance on the issuer’s accounting for convertible instruments and the guidance on the derivative scope exception for contracts in an entity’s own equity such that fewer conversion features will require separate recognition, and fewer freestanding instruments, like warrants, will require liability treatment. ASU 2020-06 is effective for fiscal years beginning after December 15, 2021. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements.

Financial Instruments - FASB ASU 2020-03, Codification Improvements to Financial Instruments, makes clear the determination of the contractual life of a net investment in leases in estimating expected credit losses under ASC 326, Financial Instruments – Credit Losses. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. ASU 2016-13 is effective for the Company in 2023. Early adoption is permitted. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements.

Income Tax - In December 2019, the FASB issued ASU 2019-12, which modifies ASC 740 to simplify the accounting for income taxes. The ASU’s amendments are based on changes that were suggested by stakeholders as part of the FASB’s initiative to reduce the complexity of accounting standards while maintaining or enhancing the helpfulness of information provided to financial statement users. ASU 2019-12 is effective for fiscal years beginning after December 15, 2022. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements.

Revenue Recognition

The Company derives its revenues primarily through the sale and delivery of promised goods and services to distributors and end-users in various sectors such as, but not limited to, the gaming, industrial, IT, and consumer products industries. The Company disaggregates revenue based on the following contract types:

•Commercial Product and Service contracts including sales of high-powered GaN-based products manufactured utilizing the Company’s proprietary and patented epiwafer technology and wafer fabrication and other assembly processes, sales of GaN epiwafers for the radio frequency (“RF”) and power markets, as well as enabling EPI wafer growth services and products to our strategic partners.

•Government contracts for research and development related services and activities.

•Licensing contracts including sales of licenses to use such patented proprietary technology.

The Company follows a five-step approach for recognizing revenue, consisting of the following: (1) identifying the contract with a customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations in the contract; and (5) recognizing revenue when, or as, the entity satisfies a performance obligation. Sales and other taxes the Company collects concurrent with revenue-producing activities are excluded from revenue. Incidental items that are immaterial in the context of the contract are recognized as expense. The Company does not have any significant financing components associated with its revenue contracts, as payment is received at or shortly after the point of sale.

Commercial Product and Service contracts

Performance obligations are satisfied, and revenue is recognized when control of a good or service promised in a contract is transferred to a customer using relative standalone selling prices. Control is obtained when a customer has the ability to direct the use of and obtain substantially all of the remaining benefits from that good or service at a point in time, and in an amount that reflects the consideration it expects to be entitled to, in exchange for those products or services. The majority of the Company's revenue under commercial product and service contracts is derived from product sales.

Revenue is recognized over-time if the customer receives the benefits as the Company performs work, if the customer controls the asset as it is being produced (continuous transfer of control), or if the product being produced for the customer has no alternative use and we have a contractual right to payment for performance to date. The Company recognizes revenue ratably over-time under the cooperation and development agreement with Yaskawa Electric Corporation (“Yaskawa”).

Sales of products or services typically do not include more than one performance obligation.

A portion of the Company’s products are sold through distributors. Distributors stock inventory and sell the Company’s products to their own customer base. The Company recognizes revenue upon shipment of its products to its distributors.

Master supply or distributor agreements are in place with many of the Company's customers and contain terms and conditions including, but not limited to, payment, delivery, incentives and warranty. These agreements sometimes require minimum purchase commitments. If a master supply, distributor or other similar agreement is not in place with a customer, the Company considers a purchase order, which is governed by the Company’s standard terms and conditions, to be the contract governing the relationship with that customer.

Pricing terms are negotiated independently on a stand-alone basis. Revenue is measured based on the amount of net consideration to which the Company expects to be entitled to receive in exchange for products or services.

Government contracts

Government contract revenues are principally generated under research and development contracts with agencies of the U.S. government. Performance obligations under government contracts are satisfied over-time as customer receives the benefits as the Company performs work, the customer controls the asset as it is being produced (continuous transfer of control), and the Company has a contractual right to payment for performance to date.

Licensing contracts

From time to time, the Company may enter into licensing arrangements related to its intellectual property. Revenue from licensing arrangements is recognized when earned and estimable. The timing of revenue recognition is dependent on the terms of each license agreement. Generally, the Company will recognize non-refundable upfront licensing fees related to patent licenses immediately upon receipt of the funds if the Company has no significant future obligations to perform under the arrangement.

In the case that the arrangement gives rise to variable consideration in the form of milestone and royalty payments, the Company evaluates the royalties to determine if they qualify for the sales and usage-based royalty exception. In the case of the Company’s royalty arrangement with Nexperia, the Company determined the royalties qualify for the sales and usage-based royalty exception, as the license of intellectual property is the predominant item to which the royalty relates and are recognized upon the subsequent sale occurring. The variable amounts are recognized at the net consideration the Company expects to receive upon satisfaction of contractually agreed upon development targets and sales volumes.