Annual report pursuant to Section 13 and 15(d)

Note 9 - Stock-based Compensation - Estimated Fair Value of Stock Options Assumptions (Details)

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Note 9 - Stock-based Compensation - Estimated Fair Value of Stock Options Assumptions (Details) - $ / shares
12 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Number of options issued (in shares) 185,000 125,000
June 10, 2020 [Member]    
Number of options issued (in shares) 110,000  
Grant date Jun. 10, 2020  
Dividend yield 6.50%  
Expected volatility 30.00%  
Risk free interest rate 0.275%  
Contractual term (years) (Year) 10 years  
Expected term (years) (Year) 4 years  
Forfeiture rate 5.00%  
Exercise price (grant-date closing price) per option (in dollars per share) $ 4.92  
Fair value per option (in dollars per share) $ 0.56  
January 4, 2021 [Member]    
Number of options issued (in shares) 75,000  
Grant date Jan. 04, 2021  
Dividend yield 4.50%  
Expected volatility 35.00%  
Risk free interest rate 0.26%  
Contractual term (years) (Year) 10 years  
Expected term (years) (Year) 4 years  
Forfeiture rate 5.00%  
Exercise price (grant-date closing price) per option (in dollars per share) $ 7.11  
Fair value per option (in dollars per share) $ 1.30  
June 13, 2019 [Member]    
Number of options issued (in shares)   125,000
Grant date   Jun. 13, 2019
Dividend yield   6.72%
Expected volatility   25.00%
Risk free interest rate   1.81%
Contractual term (years) (Year)   10 years
Expected term (years) (Year)   4 years
Forfeiture rate   5.00%
Exercise price (grant-date closing price) per option (in dollars per share)   $ 4.76
Fair value per option (in dollars per share)   $ 0.39