Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Stock-based Compensation - Estimated Fair Value of Stock Options Assumptions (Details)

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Note 7 - Stock-based Compensation - Estimated Fair Value of Stock Options Assumptions (Details) - $ / shares
6 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Number of options issued (in shares) 125,000 110,000
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  
June 13, 2018 [Member]    
Number of options issued (in shares)   110,000
Grant date   Jun. 13, 2018
Dividend yield   5.42%
Expected volatility   25.00%
Risk free interest rate   2.78%
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)   $ 5.90
Fair value per option (in dollars per share)   $ 0.49