Note H - Income Taxes - Summary of Income Tax Examinations (Details)	12 Months Ended
	Mar. 31, 2024
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]
Open tax year	2021 2022 2023 2024
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member]
Open tax year	2021 2022 2023 2024
State and Local Jurisdiction [Member] | New York City Tax Commission [Member]
Open tax year	2021 2022 2023 2024
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member]
Open tax year	2020 2021 2022 2023 2024
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Open tax year	2020 2021 2022 2023 2024