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Retirement of Treasury Stock (Details) - USD ($)
Jul. 02, 2020
Mar. 28, 2021
Jun. 28, 2020
Mar. 29, 2020
Treasury stock (in shares)   10,250 5,789,600 5,776,819
Treasury stock at cost   $ 62,800   $ 58,496,200
Increase in unissued shares upon retirement 5,789,600      
Common stock, authorized (in shares) 15,000,000 15,000,000   15,000,000
Treasury Stock        
Treasury stock at cost     $ 58,555,000  
Treasury Stock Retirement Resolutions 2020        
Change to total stockholders' equity $ 0