Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Number of shares authorized for issuance under share-based payment arrangement.

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Note G - Stock Based Compensation (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Sep. 01, 2016
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	281,000		270,000
2016 Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				500,000
2016 Restricted Stock Plan [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	281,000
Share-based Payment Arrangement, Expense	$ 110,813	$ 83,236
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 787,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	3 years
2016 Restricted Stock Plan [Member] \| Restricted Stock [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	160,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	5 years
2016 Restricted Stock Plan [Member] \| Restricted Stock [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	20,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	5 years
2016 Restricted Stock Plan [Member] \| Restricted Stock [Member] \| Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	20,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	2 years
2016 Restricted Stock Plan [Member] \| Restricted Stock [Member] \| Share-based Payment Arrangement, Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	11,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	1 year
2016 Restricted Stock Plan [Member] \| Restricted Stock [Member] \| Share-based Payment Arrangement, Tranche Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	70,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	5 years