Contingencies	12 Months Ended
Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Note 14 — Contingencies Periodically, the Company is involved in a variety of claims, suits, investigations and proceedings arising in the ordinary course of business, including government investigations and claims, and other claims and proceedings with respect to intellectual property, breach of contract, labor and employment, tax and other matters. Such matters could result in fines; penalties, compensatory, treble or other damages; or non-monetary relief. A violation of government contract laws and regulations could also result in the termination of its government contracts or debarment from bidding on future government contracts. Although claims, suits, investigations and proceedings are inherently uncertain and their results cannot be predicted with certainty, the Company believes that the resolution of its current pending matters will not have a material adverse effect on its business, financial condition, results of operations or liquidity. The Company has contracts with various U.S. Government agencies. Accordingly, the Company is routinely subject to audit and review by the DCMA, the DCAA and other U.S. Government agencies of its performance on government contracts, indirect rates and pricing practices, accounting and management internal control business systems, and compliance with applicable contracting and procurement laws, regulations and standards. An adverse outcome to a review or audit or other failure to comply with applicable contracting and procurement laws, regulations and standards could result in material civil and criminal penalties and administrative sanctions being imposed on the Company, which may include termination of contracts, forfeiture of profits, triggering of price reduction clauses, suspension of payments, significant customer refunds, fines and suspension, or a prohibition on doing business with U.S. Government agencies. In addition, if the Company fails to obtain an “adequate” determination of its various accounting and management internal control business systems from applicable U.S. Government agencies or if allegations of impropriety are made against it, the Company could suffer serious harm to its business or its reputation, including its ability to bid on new contracts or receive contract renewals and its competitive position in the bidding process. As of March 31, 2023, the DCAA had completed its incurred cost audit for fiscal years 2004, 2016, 2019, 2020 and 2021. The DCMA approved the Company’s incurred costs for those fiscal years with the exception of 2021, which is pending. The DCMA also approved the Company’s incurred costs for fiscal years 2005 through 2015, 2017, 2018 and 2022 without further audit based on the determination of low risk. Although the Company has recorded contract revenues subsequent to fiscal year 2020 based upon an estimate of costs that the Company believes will be approved upon final audit or review, the Company does not know the outcome of any ongoing or future audits or reviews and adjustments, and if future adjustments exceed the Company’s estimates, its profitability would be adversely affected. As of March 31, 2023 and 2022, the Company had $12.9 million and $12.1 million, respectively, in contract-related reserves for its estimate of potential refunds to customers for potential cost adjustments on several multi-year U.S. Government cost reimbursable contracts. This reserve is classified as either an element of accrued liabilities or as a reduction of unbilled accounts receivable based on the status of the related contracts. Certain matters resolved during fiscal year 2023 On July 8, 2022, Cisco Systems, Inc. (Cisco), which previously acquired Acacia Communications, Inc. (Acacia), paid the Company approximately $62.2 million. The payment fully satisfied the July 2019 judgment previously entered against Acacia related to Acacia's breach of contract and misuse of the Company's soft decision forward error correction technology. During the second quarter of fiscal year 2023, the Company recorded $55.8 million as product revenues in the Company's commercial networks segment and $6.4 million as interest income with respect to such payment. On May 8, 2023, subsequent to the fiscal year end, Cisco paid the Company an additional approximately $97.5 million pursuant to a judgment entered against Acacia on May 4, 2023. The 2023 judgment obligates Acacia to make contractual royalty payments to the Company based on the quarterly sales of certain of its products. Like the prior July 2019 judgment, the May 2023 judgment was entered against Acacia due to its breach of contract and continued use of the Company’s soft decision forward error correction technology. The ultimate resolution of the matter is currently unknown; Acacia has until July 10, 2023 to appeal the May 2023 judgment.

Contingencies

12 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Note 14 — Contingencies

Periodically, the Company is involved in a variety of claims, suits, investigations and proceedings arising in the ordinary course of business, including government investigations and claims, and other claims and proceedings with respect to intellectual property, breach of contract, labor and employment, tax and other matters. Such matters could result in fines; penalties, compensatory, treble or other damages; or non-monetary relief. A violation of government contract laws and regulations could also result in the termination of its government contracts or debarment from bidding on future government contracts. Although claims, suits, investigations and proceedings are inherently uncertain and their results cannot be predicted with certainty, the Company believes that the resolution of its current pending matters will not have a material adverse effect on its business, financial condition, results of operations or liquidity.

The Company has contracts with various U.S. Government agencies. Accordingly, the Company is routinely subject to audit and review by the DCMA, the DCAA and other U.S. Government agencies of its performance on government contracts, indirect rates and pricing practices, accounting and management internal control business systems, and compliance with applicable contracting and procurement laws, regulations and standards. An adverse outcome to a review or audit or other failure to comply with applicable contracting and procurement laws, regulations and standards could result in material civil and criminal penalties and administrative sanctions being imposed on the Company, which may include termination of contracts, forfeiture of profits, triggering of price reduction clauses, suspension of payments, significant customer refunds, fines and suspension, or a prohibition on doing business with U.S. Government agencies. In addition, if the Company fails to obtain an “adequate” determination of its various accounting and management internal control business systems from applicable U.S. Government agencies or if allegations of impropriety are made against it, the Company could suffer serious harm to its business or its reputation, including its ability to bid on new contracts or receive contract renewals and its competitive position in the bidding process. As of March 31, 2023, the DCAA had completed its incurred cost audit for fiscal years 2004, 2016, 2019, 2020 and 2021. The DCMA approved the Company’s incurred costs for those fiscal years with the exception of 2021, which is pending. The DCMA also approved the Company’s incurred costs for fiscal years 2005 through 2015, 2017, 2018 and 2022 without further audit based on the determination of low risk. Although the Company has recorded contract revenues subsequent to fiscal year 2020 based upon an estimate of costs that the Company believes will be approved upon final audit or review, the Company does not know the outcome of any ongoing or future audits or reviews and adjustments, and if future adjustments exceed the Company’s estimates, its profitability would be adversely affected. As of March 31, 2023 and 2022, the Company had $12.9 million and $12.1 million, respectively, in contract-related reserves for its estimate of potential refunds to customers for potential cost adjustments on several multi-year U.S. Government cost reimbursable contracts. This reserve is classified as either an element of accrued liabilities or as a reduction of unbilled accounts receivable based on the status of the related contracts.

Certain matters resolved during fiscal year 2023

On July 8, 2022, Cisco Systems, Inc. (Cisco), which previously acquired Acacia Communications, Inc. (Acacia), paid the Company approximately $62.2 million. The payment fully satisfied the July 2019 judgment previously entered against Acacia related to Acacia's breach of contract and misuse of the Company's soft decision forward error correction technology. During the second quarter of fiscal year 2023, the Company recorded $55.8 million as product revenues in the Company's commercial networks segment and $6.4 million as interest income with respect to such payment.

On May 8, 2023, subsequent to the fiscal year end, Cisco paid the Company an additional approximately $97.5 million pursuant to a judgment entered against Acacia on May 4, 2023. The 2023 judgment obligates Acacia to make contractual royalty payments to the Company based on the quarterly sales of certain of its products. Like the prior July 2019 judgment, the May 2023 judgment was entered against Acacia due to its breach of contract and continued use of the Company’s soft decision forward error correction technology. The ultimate resolution of the matter is currently unknown; Acacia has until July 10, 2023 to appeal the May 2023 judgment.

- Definition

The entire disclosure for loss and gain contingencies. Describes any existing condition, situation, or set of circumstances involving uncertainty as of the balance sheet date (or prior to issuance of the financial statements) as to a probable or reasonably possible loss incurred by an entity that will ultimately be resolved when one or more future events occur or fail to occur, and typically discloses the amount of loss recorded or a range of possible loss, or an assertion that no reasonable estimate can be made.

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