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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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Gross number of share options (or share units) granted during the period.

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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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Note 5 - Share-based Compensation Plans (Details Textual) - The 2020 Equity Incentive Plan [Member] - USD ($)		12 Months Ended
	Mar. 03, 2020	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				1,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)		979,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)		109,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		248,000
Share-Based Payment Arrangement, Expense		$ 250,359	$ 174,124
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 565,977
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		2 years 3 months 21 days
Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
Share-Based Payment Arrangement, Option [Member] \| Share-Based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	5 years