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Building and improvements Document Fiscal Period Focus Customer [Domain] Document Fiscal Year Focus Amendment Flag Common Stock [Member] Proceeds from sale of marketable securities Proceeds from Sale and Maturity of Marketable Securities us-gaap_AccruedSalariesCurrent Payroll and related expenses us-gaap_AccruedProfessionalFeesCurrent Audit fee Concentration Risk [Table] Accrued expenses Total accrued expenses Concentration Risk Type [Axis] dei_DocumentPeriodEndDate Document Period End Date us-gaap_AccruedInsuranceCurrent Insurance Concentration Risk Disclosure [Text Block] Dividends payable Legal Entity [Axis] Net gains recognized during the period on marketable securities dei_EntityFileNumber Entity File Number Entity Tax Identification Number Supplemental disclosure of non-cash items: us-gaap_OtherAccruedLiabilitiesCurrent Other Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table] Entity [Domain] Entity Central Index Key dei_EntityRegistrantName Entity Registrant Name dei_EntityCurrentReportingStatus Entity Current Reporting Status Accounts Receivable [Member] Entity Incorporation, State or Country Code Current Fiscal Year End Date Concentration Risk Type [Domain] Research and development expense Entity Filer Category dei_EntityShellCompany Entity Shell Company Entity Emerging Growth Company Entity Small Business us-gaap_OperatingIncomeLoss Income from operations Cash and Cash Equivalents [Domain] Demand Deposits CHINA us-gaap_DebtAndEquitySecuritiesRealizedGainLoss Less: Net losses (gains) realized on marketable securities sold during the period Debt and Equity Securities, Realized Gain (Loss) Costs and expenses: Net unrealized (losses) gains recognized during the reporting period on marketable securities still held at the reporting date dei_EntityAddressStateOrProvince Entity Address, State or Province Statement of Stockholders' Equity [Abstract] Distributors and Marketing Partners [Member] Represents distributors and marketing partners of the company. dei_EntityAddressCityOrTown Entity Address, City or Town Inventory, Current [Table] Retained earnings dei_EntityAddressAddressLine1 Entity Address, Address Line One Statement of Cash Flows [Abstract] dei_CityAreaCode City Area Code dei_LocalPhoneNumber Local Phone Number dei_EntityAddressPostalZipCode Entity Address, Postal Zip Code Revenue from Contract with Customer [Text Block] Stockholders’ equity: Title of 12(b) Security Equity Components [Axis] Cash and Cash Equivalents Disclosure [Text Block] Security Exchange Name Trading Symbol Class of Stock [Axis] Equity Component [Domain] Related Party Transaction [Domain] dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) Retained Earnings [Member] Distributor [Member] Information pertaining to the distributor. 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This disclosure informs financial statement users about the general nature of the risk associated with the vendor concentration, and may indicate the percentage of vendor concentration risk as of the balance sheet date. us-gaap_AccruedMarketingCostsCurrent Sales rebates Allowance for credit losses Scenario [Axis] Scenario [Domain] Three Raw Material Vendors [Member] Represents the three raw material vendors. Property, plant, and equipment: Dividends [Text Block] Represents the entire disclosure for dividends. Common Stock, Par or Stated Value Per Share (in dollars per share) Accelerated Share Repurchases [Table] ug_DividendsDeclared Dividends declared The value of dividends declared. us-gaap_Assets TOTAL ASSETS Deferred income taxes, net us-gaap_DeferredIncomeTaxLiabilitiesNet ug_AccruedReserveForOutdatedMaterial Reserve for outdated material Carrying value on reserves for outdated material. Settlement income Amount of income as part of settlement. 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Operating expenses Prepaid expenses and other current assets us-gaap_PaymentsOfDividends Dividends paid Payments of Dividends us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Acquisition of property, plant, and equipment US Treasury Bill Securities [Member] UNITED STATES Non-US [Member] Concentration Risk Benchmark [Axis] Nature of Operation, Product Information, Concentration of Risk [Table] Concentration Risk Benchmark [Domain] us-gaap_InventoryValuationReserves Inventory Valuation Reserves Money Market Funds ug_NumberOfCustomers Number of Customers The number of customers affecting an entity's concentration risk. Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Current assets: O2025, Q1, Dividends {Member] Represents 2025 Q1 dividends. ug_NumberOfVendors Number of Vendors The number of vendors affecting an entity's concentration risk. us-gaap_AssetsCurrent Total current assets Geographic Concentration Risk [Member] ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] Net sales ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Credit Loss, Financial Instrument [Text Block] Commitments and Contingencies Marketable Securities [Table Text Block]