Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

v2.4.1.9
Related Party Transactions (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Related Party Transactions [Abstract]      
Principal owner beneficial ownership percentage 51.54%usna_PrincipalOwnerBeneficialOwnershipPercentage    
Amount paid to Medicis $ 239us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty $ 381us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty $ 359us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty