Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Customer Two Customer Two [Member] Customer Two Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Common stock, $0.001 par value; Authorized -- 50,000 shares, issued and outstanding 18,463 as of July 4, 2026 and 18,281 as of January 3, 2026 Common Stock, Value, Issued Payments related to tax withholding for net-share settled equity awards Payment, Tax Withholding, Share-Based Payment Arrangement Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Inventory write-down Inventory Write-down Derivative Instrument [Axis] Derivative Instrument [Axis] Discrete tax benefit Discrete Income Tax Benefit Discrete Income Tax Benefit Personal care and skincare Personal Care and Skincare [Member] Related to personal care and skincare. Cash received during the period for: Income Tax Paid, after Refund Received [Abstract] Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Current liabilities Liabilities, Current [Abstract] Inventory [Axis] Inventory [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Noncurrent inventories Inventory, Noncurrent Distributions to redeemable noncontrolling interest Payments to Noncontrolling Interests Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Derivative notional amount Derivative, Notional Amount Basic (in shares) Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Work in progress Inventory, Work in Process, Net of Reserves Comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Entity Address, City or Town Entity Address, City or Town Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Business combination measurement period adjustment Redeemable Noncontrolling Interest, Business Combination, Measurement Period Adjustment Redeemable Noncontrolling Interest, Business Combination, Measurement Period Adjustment Level 2 Fair Value, Inputs, Level 2 [Member] Other income (expense): Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Revenue Benchmark Revenue Benchmark [Member] United States UNITED STATES USANA Foods USANA Foods [Member] Related to USANA Foods. Concentration Risk Type [Axis] Concentration Risk Type [Axis] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Accrued purchases of property and equipment Capital Expenditures Incurred but Not yet Paid Schedule of Segment Reporting Segment Reporting [Table Text Block] Loss on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Percentage of consolidated net sales during the year Reportable Segment, Percentage of Consolidated Net Sales Reportable Segment, Percentage of Consolidated Net Sales Use of Estimates Use of Estimates, Policy [Policy Text Block] Other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent REDEEMABLE NONCONTROLLING INTEREST Noncontrolling Interest Disclosure [Text Block] Payments on line of credit Repayments of Lines of Credit Debt Instrument, Redemption, Period Two Debt Instrument, Redemption, Period Two [Member] Movement in Contract Liabilities [Roll Forward] Movement in Contract Liabilities [Roll Forward] Movement in Contract Liabilities Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] (Loss) earnings per common share from net (loss) earnings attributable to USANA: Earnings Per Share, Basic [Abstract] Security Exchange Name Security Exchange Name Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Payments for net investment hedge Payments for Hedge, Investing Activities COMMON STOCK AND EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name (Loss) earnings per common share attributable to USANA Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Number of sub geographical regions Number Of Sub-Geographical Regions The number of sub-geographical regions the company operates in. Schedule of Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Equity securities without readily determinable fair value, impairment loss, annual amount Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Geographical [Domain] Geographical [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Number of geographic regions Number Of Geographic Regions The number of geographic regions in which the company operates. Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Unrealized loss on derivatives Unrealized Gain (Loss) on Derivatives Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Credit Facility [Domain] Credit Facility [Domain] Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Ownership interest Business Combination, Voting Equity Interest Acquired, Percentage Diluted (in shares) Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Borrowings on line of credit Proceeds from Lines of Credit Deferred income taxes Deferred Income Taxes and Tax Credits DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Gross profit Gross Profit Revenue from Contract with Customer [Abstract] GOODWILL Goodwill [Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Intangible Asset, Goodwill and Other [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Equity-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Effective income tax expense (benefit) rate reconciliation Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Dilutive effect of in-the-money equity awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Inventory [Table] Inventory, Current [Table] All Executive Categories All Executive Categories [Member] Accounts receivable, allowance for credit loss, current Allowance for Credit Loss, Receivable, Other, Current Common stock repurchased and retired Stock repurchased and retired during period, value Stock Repurchased and Retired During Period, Value Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Redeemable noncontrolling interest Beginning balance Ending balance Redeemable Noncontrolling Interest, Equity, Carrying Amount Antidilutive Securities [Axis] Antidilutive Securities [Axis] Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] SEGMENT INFORMATION Segment Reporting [Text Block] INVESTMENT IN EQUITY SECURITIES Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Schedule Of Disaggregation Of Revenue Disaggregation of Revenue [Table Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Money market funds included in cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Brand Partner incentives Brand Partner Incentives Brand Partner Incentives Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Exercise Price Award Exercise Price Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Segment Information [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Effect of exchange rate changes on cash, cash equivalents, and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation LINE OF CREDIT Debt Disclosure [Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Line of Credit Facility [Abstract] Adoption Date Trading Arrangement Adoption Date Total stockholders' equity attributable to USANA Beginning balance Ending balance Equity, Attributable to Parent Other income (expense), net Nonoperating Income (Expense) ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Goodwill impairment Intangible Asset, Including Goodwill, Impairment Loss Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Income tax refund Proceeds from Income Tax Refunds Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Selling, general and administrative Selling, General and Administrative Expense Business Combination [Domain] Business Combination [Domain] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Equity awards excluded as the impact was anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Schedule of Goodwill Goodwill [Table Text Block] Foreign Exchange Option Foreign Exchange Option [Member] Gross goodwill Goodwill, Gross Accrued excise tax for repurchase of common stock Excise and Sales Taxes Entity Central Index Key Entity Central Index Key Additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Business Combination [Axis] Business Combination [Axis] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Stockholders' equity Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Operating expenses: Operating Expenses [Abstract] Deferred tax assets Deferred Income Tax Assets, Net Intersegment Eliminations Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Markets Representing Ten Percent Or More of Consolidated Net Sales and Long-Lived Assets Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table Text Block] City Area Code City Area Code Debt Instrument, Redemption, Period One Debt Instrument, Redemption, Period One [Member] Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Right-of-use asset reduction Operating Lease, Right-of-Use Asset, Periodic Reduction Schedule of Revenue by Geographic Region Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block] The Company The Company [Policy Text Block] The Company Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Operating Segments Operating Segments [Member] Interest expense Interest Expense, Nonoperating Equity securities without readily determinable fair value, amount Equity Securities without Readily Determinable Fair Value, Amount PEO PEO [Member] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Common stock repurchased and retired (in shares) Stock repurchased and retired during period, shares (in shares) Stock Repurchased and Retired During Period, Shares Other long-term liabilities Other Liabilities, Noncurrent Goodwill Net goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Decrease due to beginning contract liabilities recognized as revenue Contract with Customer, Liability, Revenue Recognized Retained earnings Retained Earnings [Member] Total operating expenses Operating Expenses Money Market Funds Money Market Funds [Member] Customer One Customer One [Member] Customer One Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Tax withholding for net-share settled equity awards Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Amortization of intangible assets, total Intangible Asset, Finite-Lived, Amortization Expense Inventory [Domain] Inventory [Domain] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Adjustments to reconcile net (loss) earnings to net cash provided by (used in) operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Deferred compensation liabilities included in other long-term liabilities Deferred Compensation Liability, Classified, Noncurrent Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net sales Net sales to external customers: Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Southeast Asia Pacific Southeast Asia Pacific [Member] Related to Southeast Asia Pacific. Line of credit Line of Credit, Current Other revenue Other Income Core Nutritional Core Nutritional [Member] Core Nutritional INVENTORIES Inventory Disclosure [Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Comprehensive (loss) income attributable to redeemable noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest REVENUE AND CONTRACT LIABILITIES Revenue from Contract with Customer [Text Block] Foreign currency contracts included in other current liabilities Foreign Currency Contracts, Liability, Fair Value Disclosure Inventories Increase (Decrease) in Inventories Segment Information [Table] Segment Reporting [Table] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Schedule Of Assets And Liabilities Measured At Fair Value Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] (Loss) earnings from operations Operating Income (Loss) Asia Pacific total Asia Pacific [Member] Current Fiscal Year End Date Current Fiscal Year End Date Cash paid during the period for: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation [Abstract] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Long-lived assets Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Common stock issued under equity award plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares, issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Line of credit facility, additional increase in maximum borrowing capacity Line Of Credit Facility Additional Increase In Maximum Borrowing Capacity Maximum borrowing capacity due to additional increase under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility Credit Agreement Credit Agreement [Member] Credit Agreement Proceeds from acquisition working capital adjustment Proceeds From Acquisition of Business, Working Capital Adjustment Proceeds From Acquisition of Business, Working Capital Adjustment Equity Components [Axis] Equity Components [Axis] Trade accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Deferred tax liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive (loss) income attributable to USANA Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Fair Value Disclosures [Table] Fair Value, Recurring and Nonrecurring [Table] Local Line of Credit Local Line of Credit [Member] Local Line of Credit Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other assets Other Assets, Noncurrent Document Type Document Type Fair Value Disclosures [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Tax (expense) benefit related to foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Fair Value as of Grant Date Award Grant Date Fair Value Hiya Hiya [Member] Hiya Goodwill [Table] Goodwill [Table] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Amended And Restated Credit Agreement Amended And Restated Credit Agreement [Member] Related to amended and restated credit agreement. Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name ORGANIZATION, CONSOLIDATION, AND BASIS OF PRESENTATION Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Net Investment Hedging Net Investment Hedging [Member] (Loss) earnings before income taxes Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] China CHINA LIABILITIES, REDEEMABLE NONCONTROLLING INTEREST, AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Increase due to deferral of revenue at end of period Increase Due To Deferral Of Revenue At Period End The amount of increase (decrease) in contract with customer liability due to deferred revenue. Inventories Inventories Inventory, Net All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount FAIR VALUE MEASURES Fair Value Disclosures [Text Block] Rise Rise Rise [Member] Related to all other. Level 3 Fair Value, Inputs, Level 3 [Member] Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Contract liabilities, included in other current liabilities, at beginning of period Contract liabilities, included in other current liabilities, at end of period Contract with Customer, Liability Income taxes Income Tax Paid, before Refund Received Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Product Concentration Risk Product Concentration Risk [Member] Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Americas and Europe Americas and Europe [Member] Related to Americas and Europe. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Equity-based compensation expense Share-Based Payment Arrangement, Noncash Expense North Asia North Asia [Member] Related to north Asia. Customer [Domain] Customer [Domain] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Repurchase of common stock Payments for Repurchase of Common Stock Total current assets Assets, Current Insider Trading Arrangements [Line Items] Finished Goods Finished Goods [Member] Finished Goods Award Type Award Type [Axis] Debt instrument, covenant ratio of consolidated funded debt to adjusted earnings before interest, taxes, depreciation, and amortization Debt Instrument, Covenant, Ratio Of Consolidated Funded Debt To Adjusted Earnings Before Interest Taxes Depreciation And Amortization The covenant ratio of consolidated debt to adjusted earnings before interest, taxes, depreciation, and amortization for a debt instrument. Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Restricted cash included in other assets Restricted Cash, Noncurrent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Greater China Greater China [Member] Related to Greater China. Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common stock Common Stock [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Noncontrolling Interest [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Concentration risk, percentage Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Currency translation adjustment Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities, redeemable noncontrolling interest, and stockholders' equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segments [Axis] Segments [Axis] Other liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Other, net Other Nonoperating Income (Expense) Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Schedule of Reconciliation of Changes in Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Trade accounts receivable (net of allowance of $92 and $137, respectively) Receivables, Net, Current Adjustment to Compensation: Adjustment to Compensation [Axis] Net (loss) earnings attributable to redeemable noncontrolling interest Net (loss) earnings attributable to redeemable noncontrolling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Hedging Designation [Domain] Hedging Designation [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Other comprehensive income (loss), net of tax: Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Trade Accounts Receivable Trade Accounts Receivable [Member] Payments for the settlement of net investment hedges Payments For The Settlement Of Net Investment Hedges Payments For The Settlement Of Net Investment Hedges Inventory [Line Items] Inventory [Line Items] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Goodwill impairment Impairment Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Debt instrument covenant, adjusted earnings before interest taxes, depreciation, and amortization Debt Instrument Covenant Adjusted Earnings Before Interest Taxes Depreciation And Amortization The amount of debt instrument covenant for adjusted earnings before interest taxes, depreciation, and amortization. Depreciation and amortization Depreciation, Depletion and Amortization Common stock issued under equity award plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Net (loss) earnings Net (loss) earnings Net (loss) earnings Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Right-of-use assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income taxes Income tax expense Income Tax Expense (Benefit) Customer Concentration Risk Customer Concentration Risk [Member] Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net (loss) earnings attributable to USANA Net earnings (loss) attributable to USANA Net earnings attributable to USANA Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Raw Materials Raw Materials [Member] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Interest income Investment Income, Interest Schedule Of Contract with Customer, Contract Asset, Contract Liability, and Receivable Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] USANA® Nutritionals USANA Nutritionals [Member] Related to USANA Nutritionals. Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Share-Based Payment Arrangement Share-Based Payment Arrangement [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract]