XML 87 R73.htm IDEA: XBRL DOCUMENT
v3.20.4

Note N - Related-Party Transactions (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
Gull Global, Ltd. [Member] |  |  |
Related Party Transaction, Ownership Percentage | 40.34% |  |
Amarevita [Member] |  |  |
Related Party Transaction, Expenses from Transactions with Related Party | $ 175 | $ 177 | $ 162
Drive Marketing [Member] |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  | 444 | 804
Dark Horse Rowing, LLC [Member] |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  | $ 136 | $ 136

X
- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The ownership percentage by the related party. + References No definition available. + Details
Name: | usna_RelatedPartyTransactionOwnershipPercentage
Namespace Prefix: | usna_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=usna_GullGlobalLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=usna_AmarevitaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=usna_DriveMarketingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=usna_DarkHorseRowingLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |