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Note O - Long-term Debt (Details Textual) - USD ($)
9 Months Ended
Dec. 23, 2018
Nov. 01, 2018
May 01, 2018
Nov. 01, 2017
Dec. 23, 2018
Dec. 24, 2017
Mar. 25, 2018
Proceeds from Issuance of Long-term Debt, Total         $ 150,000,000  
Dividends Payable, Amount Per Share       $ 5      
Senior Notes [Member]              
Debt Instrument, Fixed Charge Coverage Ratio 2       2    
Debt Instrument, Priority Secured Leverage Ratio 0.4       0.4    
Debt Instrument Secured Leverage Ratio 3.75       3.75    
Debt Instrument, Event of Default, Percentage Ownership Enabling the Declaration of Due and Payable 25.00%       25.00%    
Senior Notes [Member] | In The Event of Certain Equity Offerings [Member]              
Debt Instrument, Redemption Price, Percentage 106.625%            
Senior Notes [Member] | In the Event of Chang of Control Offer [Member]              
Debt Instrument, Redemption Price, Percentage 101.00%            
Senior Notes [Member] | In the Event the Company Sells Certain Assets and Fails to Use the Proceeds as Required [Member]              
Debt Instrument, Redemption Price, Percentage 100.00%            
Senior Notes [Member] | Senior Secured 2025 Notes [Member]              
Proceeds from Issuance of Long-term Debt, Total       $ 150,000,000      
Debt Instrument, Interest Rate, Stated Percentage 6.625%     6.625% 6.625%   6.625%
Debt Instrument, Periodic Payment, Interest   $ 4,968,750 $ 4,968,750        
Senior Notes [Member] | Senior Secured 2020 Notes [Member]              
Debt Instrument, Interest Rate, Stated Percentage       10.00%      
Senior Notes [Member] | Option to Redeem Notes at Redemption Price Equal to the Percentage of Principal Amount plus the Applicable Premium [Member]              
Debt Instrument, Redemption Price, Percentage 100.00%            
Senior Notes [Member] | Option to Redeem Notes at Redemption Price Equal to the Percentage of Principal Amount plus the Applicable Premium [Member] | Applicable Premium if Percentage of Principal Amount is Greater than Treasury Rate Basis Spread [Member]              
Debt Instrument, Applicable Premium, Percentage of Principal Amount 1.00%       1.00%    
Senior Notes [Member] | Option to Redeem Notes at Redemption Price Equal to the Percentage of Principal Amount plus the Applicable Premium [Member] | Applicable Premium if Treasury Rate Basis Spread is Greater than Percentage of Principal Amount [Member] | Treasury Rate [Member]              
Debt Instrument, Applicable Premium, Treasury Rate Basis Spread 0.50%       0.50%    
Senior Notes [Member] | Option to Redeem at Redemption Price Equal to Percentage of Principal Amount [Member] | In The Event of Certain Equity Offerings [Member] | Maximum [Member]              
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 35.00%