v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
C000069385 | LVMH Moet Hennessy Louis Vuitton SEADR_502441306  
Holdings [Line Items]  
Percent of Net Asset Value 6.78%
C000069385 | Hermes International SCANone_5253973  
Holdings [Line Items]  
Percent of Net Asset Value 6.26%
C000069385 | Cie Financiere Richemont SANone_BCRWZ18  
Holdings [Line Items]  
Percent of Net Asset Value 6.01%
C000069385 | Ferrari NVNone_N3167Y103  
Holdings [Line Items]  
Percent of Net Asset Value 5.74%
C000069385 | Tesla, Inc.None_88160R101  
Holdings [Line Items]  
Percent of Net Asset Value 5.28%
C000069385 | Royal Caribbean Cruises, Ltd.None_V7780T103  
Holdings [Line Items]  
Percent of Net Asset Value 5.27%
C000069385 | Viking Holdings, Ltd.None_G93A5A101  
Holdings [Line Items]  
Percent of Net Asset Value 3.85%
C000069385 | Amazon.com, Inc.None_023135106  
Holdings [Line Items]  
Percent of Net Asset Value 3.48%
C000069385 | Mercedes-Benz Group AGADR_233825207  
Holdings [Line Items]  
Percent of Net Asset Value 3.21%
C000069385 | Carnival Corp., Ltd.None_G2004J103  
Holdings [Line Items]  
Percent of Net Asset Value 2.92%
C000069385 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Total Investments 60.70%
C000069385 | Consumer Staples  
Holdings [Line Items]  
Percent of Total Investments 22.70%
C000069385 | Financials  
Holdings [Line Items]  
Percent of Total Investments 6.40%
C000069385 | Materials  
Holdings [Line Items]  
Percent of Total Investments 4.40%
C000069385 | Communication Services  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000069385 | Other  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000012993 | Abaxx Technologies, Inc.None_BQ3R054  
Holdings [Line Items]  
Percent of Net Asset Value 11.01%
C000012993 | Montage Gold Corp.None_BMYMV13  
Holdings [Line Items]  
Percent of Net Asset Value 8.39%
C000012993 | Woodside Energy Group, Ltd.ADR_980228308  
Holdings [Line Items]  
Percent of Net Asset Value 4.45%
C000012993 | Sunrise Energy Metals, Ltd.None_BN4MX14  
Holdings [Line Items]  
Percent of Net Asset Value 3.89%
C000012993 | TotalEnergies SENone_F92124100  
Holdings [Line Items]  
Percent of Net Asset Value 3.16%
C000012993 | Nutrien, Ltd.None_67077M108  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000012993 | Cheniere Energy, Inc.None_16411R208  
Holdings [Line Items]  
Percent of Net Asset Value 2.73%
C000012993 | Shell PLCADR_780259305  
Holdings [Line Items]  
Percent of Net Asset Value 2.57%
C000012993 | K92 Mining, Inc.None_BYZ2CB3  
Holdings [Line Items]  
Percent of Net Asset Value 2.32%
C000012993 | Coeur Mining, Inc.None_192108504  
Holdings [Line Items]  
Percent of Net Asset Value 2.26%
C000012993 | Other  
Holdings [Line Items]  
Percent of Total Investments 21.20%
C000012993 | Gold Mining  
Holdings [Line Items]  
Percent of Total Investments 18.90%
C000012993 | Metal - Diversified  
Holdings [Line Items]  
Percent of Total Investments 13.10%
C000012993 | Enterprise Software/Services  
Holdings [Line Items]  
Percent of Total Investments 11.50%
C000012993 | Oil Companies - Integrated  
Holdings [Line Items]  
Percent of Total Investments 8.70%
C000012993 | Oil Companies - Exploration & Production  
Holdings [Line Items]  
Percent of Total Investments 7.50%
C000012993 | Metal - Copper  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000012993 | Diversified Minerals  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000012993 | Precious Metals  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000012993 | Silver Mining  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000012993 | Agricultural Chemicals  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000012994 | K92 Mining, Inc.None_BYZ2CB3  
Holdings [Line Items]  
Percent of Net Asset Value 6.45%
C000012994 | Aya Gold & Silver, Inc.None_BK94091  
Holdings [Line Items]  
Percent of Net Asset Value 6.03%
C000012994 | Discovery Silver Corp.None_BND9899  
Holdings [Line Items]  
Percent of Net Asset Value 5.03%
C000012994 | Americas Gold & Silver Corp.None_BVMJP62  
Holdings [Line Items]  
Percent of Net Asset Value 4.66%
C000012994 | Mineros SANone_BP0QM95  
Holdings [Line Items]  
Percent of Net Asset Value 4.58%
C000012994 | DPM Metals, Inc.None_BPCR7W4  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000012994 | IAMGOLD Corp.None_450913108  
Holdings [Line Items]  
Percent of Net Asset Value 3.74%
C000012994 | Vox Royalty Corp.None_92919F103  
Holdings [Line Items]  
Percent of Net Asset Value 2.94%
C000012994 | Barrick Mining Corp.None_06849F108  
Holdings [Line Items]  
Percent of Net Asset Value 2.57%
C000012994 | Aris Mining Corp.None_BQKRCQ2  
Holdings [Line Items]  
Percent of Net Asset Value 2.45%
C000012994 | Other  
Holdings [Line Items]  
Percent of Total Investments 10.00%
C000012994 | Gold Mining  
Holdings [Line Items]  
Percent of Total Investments 51.10%
C000012994 | Metal - Diversified  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000012994 | Precious Metals  
Holdings [Line Items]  
Percent of Total Investments 17.10%
C000012994 | Silver Mining  
Holdings [Line Items]  
Percent of Total Investments 18.20%
C000013000 | Texas  
Holdings [Line Items]  
Percent of Net Asset Value 17.76%
C000013000 | Tennessee  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000013000 | Kentucky  
Holdings [Line Items]  
Percent of Net Asset Value 10.23%
C000013000 | California  
Holdings [Line Items]  
Percent of Net Asset Value 9.97%
C000013000 | Pennsylvania  
Holdings [Line Items]  
Percent of Net Asset Value 6.08%
C000013000 | Wisconsin  
Holdings [Line Items]  
Percent of Net Asset Value 5.93%
C000013000 | Alabama  
Holdings [Line Items]  
Percent of Net Asset Value 5.15%
C000013000 | Illinois  
Holdings [Line Items]  
Percent of Net Asset Value 4.99%
C000013000 | Kansas  
Holdings [Line Items]  
Percent of Net Asset Value 3.25%
C000013000 | New Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 2.99%
C000012998 | U.S. Treasury Bill_912797VF1  
Holdings [Line Items]  
Percent of Net Asset Value 15.54%
C000012998 | U.S. Treasury Note/Bond_91282CQS3  
Holdings [Line Items]  
Percent of Net Asset Value 14.48%
C000012998 | Federal Home Loan Mortgage Corp._3137BTUN9  
Holdings [Line Items]  
Percent of Net Asset Value 11.23%
C000012998 | U.S. Treasury Bill_912797UQ8  
Holdings [Line Items]  
Percent of Net Asset Value 9.66%
C000012998 | U.S. Treasury Bill_912797TC1  
Holdings [Line Items]  
Percent of Net Asset Value 7.92%
C000012998 | U.S. Treasury Bill_912797RG4  
Holdings [Line Items]  
Percent of Net Asset Value 6.43%
C000012998 | U.S. Treasury Note/Bond_91282CQL8  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000012998 | U.S. Treasury Bill_912797UX3  
Holdings [Line Items]  
Percent of Net Asset Value 6.24%
C000012998 | Federal Home Loan Mortgage Corp._3137FQXJ7  
Holdings [Line Items]  
Percent of Net Asset Value 5.28%
C000012998 | Federal Home Loan BankVirginia_3130APH99  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000012998 | U.S. Treasury Bill  
Holdings [Line Items]  
Percent of Total Investments 55.20%
C000012998 | U.S. Treasury Note/Bond  
Holdings [Line Items]  
Percent of Total Investments 22.20%
C000012998 | Federal Home Loan Mortgage Corp.  
Holdings [Line Items]  
Percent of Total Investments 17.50%
C000012998 | Federal Home Loan Bank  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000012995 | Montage Gold Corp.None_BMYMV13  
Holdings [Line Items]  
Percent of Net Asset Value 5.01%
C000012995 | K92 Mining, Inc.None_BYZ2CB3  
Holdings [Line Items]  
Percent of Net Asset Value 3.53%
C000012995 | Omai Gold Mines Corp.None_BN6KMB9  
Holdings [Line Items]  
Percent of Net Asset Value 7.47%
C000012995 | Radisson Mining Resources, Inc.None_2721428  
Holdings [Line Items]  
Percent of Net Asset Value 6.64%
C000012995 | G2 Goldfields, Inc.None_BJMF641  
Holdings [Line Items]  
Percent of Net Asset Value 4.97%
C000012995 | TriStar Gold, Inc.None_B4WLCK2  
Holdings [Line Items]  
Percent of Net Asset Value 4.95%
C000012995 | Vizsla Silver Corp.None_BS84LB7  
Holdings [Line Items]  
Percent of Net Asset Value 3.94%
C000012995 | Vizsla Royalties Corp.None_BNKKX45  
Holdings [Line Items]  
Percent of Net Asset Value 2.79%
C000012995 | Tolu Minerals, Ltd.None_BMH6RX6  
Holdings [Line Items]  
Percent of Net Asset Value 2.44%
C000012995 | Highlander Silver Corp.None_BRBR2F7  
Holdings [Line Items]  
Percent of Net Asset Value 2.29%
C000012995 | Other  
Holdings [Line Items]  
Percent of Total Investments 5.70%
C000012995 | Gold Mining  
Holdings [Line Items]  
Percent of Total Investments 57.90%
C000012995 | Metal - Diversified  
Holdings [Line Items]  
Percent of Total Investments 6.20%
C000012995 | Diversified Minerals  
Holdings [Line Items]  
Percent of Total Investments 4.50%
C000012995 | Precious Metals  
Holdings [Line Items]  
Percent of Total Investments 16.80%
C000012995 | Silver Mining  
Holdings [Line Items]  
Percent of Total Investments 8.90%