Document And Entity Information - shares
6 Months Ended
Oct. 26, 2019
Dec. 02, 2019
Document Information [Line Items]    
Entity Central Index Key 0000069891  
Entity Registrant Name National Beverage Corp.  
Amendment Flag false  
Current Fiscal Year End Date --05-01  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2020  
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Oct. 26, 2019  
Entity File Number 1-14170  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 59-2605822  
Entity Address, Address Line One 8100 SW Tenth Street, Suite 4000  
Entity Address, City or Town Fort Lauderdale  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33324  
City Area Code 954  
Local Phone Number 581-0922  
Title of 12(b) Security Common Stock, par value $.01 per share  
Trading Symbol FIZZ  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   46,562,579