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Note 9 - Contributions for All Multi-employer Pension Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2016 | May 02, 2015 | May 03, 2014
CSSS Fund [Member] |  |  |
Fund | $ 1,172 | $ 1,103 | $ 1,079
WCT Fund [Member] |  |  |
Fund | 485 | 637 | 476
Other Multi Employer Pension Funds [Member] |  |  |
Fund | 448 | 306 | 295
Fund | $ 2,105 | $ 2,046 | $ 1,850

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- Definition Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
Name: | us-gaap_MultiemployerPlanPeriodContributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_MultiemployerPlanNameAxis=fizz_CSSSFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MultiemployerPlanNameAxis=fizz_WCTFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MultiemployerPlanNameAxis=fizz_OtherMultiEmployerPensionFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |