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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate May 31, 2020
Entity Registrant Name dei_EntityRegistrantName INTEGRITY FUNDS
Entity Central Index Key dei_EntityCentralIndexKey 0000893730
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Sep. 28, 2020
Document Effective Date dei_DocumentEffectiveDate Sep. 30, 2020
Prospectus Date rr_ProspectusDate Sep. 30, 2020
Integrity Short Term Government Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol MDSAX
Integrity Short Term Government Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol MDSIX