Represents the number of shareholder approved plans under which shares were available for equity based awards.

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The maximum number of shares (or other type of equity) originally approved to be issued in connection with performance awards and stock awards (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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No definition available.

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Represents the weighted average grant-date fair value of options granted during the reporting period.

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

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

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Price of a single share of a number of saleable stocks of a company.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Note 9 - Share-based Compensation (Details Textual)					12 Months Ended
Note 9 - Share-based Compensation (Details Textual)	Oct. 01, 2024 shares	Sep. 10, 2024 shares	Oct. 13, 2023 shares	Apr. 03, 2023 shares	Mar. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($)	Dec. 31, 2021 shares	Aug. 25, 2016 shares	Aug. 28, 2014 shares
Number of Shareholder Approved Share-based Compensation Plans					2
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					2,100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)					1,237,031
Share Price (in dollars per share) \| $ / shares					$ 0.35	$ 0.29
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value \| $					$ 0	$ 0
Share-based Compensation Arrangement By Share-based Payment Award, Weighted Average Grant Date Fair Value, Options Granted \| $					8,000	24,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value \| $					96,000	99,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense \| $					54,000	98,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount \| $					$ 35,000	$ 58,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					1 year 8 months 12 days	1 year 3 months 18 days
Restricted Stock [Member] \| Share-Based Payment Arrangement, Nonemployee [Member]
Share-Based Payment Arrangement, Expense \| $					$ 94,000	$ 126,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)					116,049	159,493
Restricted Stock [Member] \| Share-Based Payment Arrangement, Nonemployee [Member] \| One Board Member [Member]
Share-Based Payment Arrangement, Expense \| $						$ 10,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	13,158	66,667	12,821
Restricted Stock [Member] \| Share-Based Payment Arrangement, Nonemployee [Member] \| Board Members [Member]
Share-Based Payment Arrangement, Expense \| $					$ 20,000	$ 40,000
Restricted Stock [Member] \| Share-Based Payment Arrangement, Nonemployee [Member] \| Two Board Members [Member]
Share-Based Payment Arrangement, Expense \| $							$ 15,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				17,672
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)						204,964
Restricted Stock Units (RSUs) [Member] \| Employees [Member]
Share-Based Payment Arrangement, Expense \| $					79,000	$ 124,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount \| $					$ 25,000	$ 98,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					4 months 24 days	1 year 2 months 12 days
Maximum [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)					10 years
Maximum [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)					3 years
Minimum [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)					1 year
The 2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					1,300,000				1,300,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)					632,905
The 2016 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized for Issuance in Connection with Performance Awards and Stock Awards (in shares)									600,000
The 2024 Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					800,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)					604,126
2014 Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					0					350,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)					0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)								300,000