Shareholder Report, Holdings (Details)	Jun. 30, 2026
C000032073 [Member]
Holdings [Line Items]
Percent of Net Asset Value	67.00%
C000032073 [Member] \| McEwen Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000032073 [Member] \| B2Gold Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000032073 [Member] \| Wheaton Precious Metals Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| G Mining Ventures Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| Endeavour Mining plc [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| Aura Minerals Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000032073 [Member] \| IAMGOLD Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000032073 [Member] \| Evolution Mining Limited [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.00%
C000032073 [Member] \| SSR Mining Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.00%
C000032073 [Member] \| DPM Metals Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000032073 [Member] \| Major Precious Metals Producers [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000032073 [Member] \| Other Natural Resources Companies [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000032073 [Member] \| Junior Precious Metals Producers [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.00%
C000032073 [Member] \| Intermediate Precious Metals Producers [Member]
Holdings [Line Items]
Percent of Net Asset Value	80.00%
C000032073 [Member] \| UNITED STATES
Holdings [Line Items]
Percent of Net Asset Value	71.00%
C000032073 [Member] \| UNITED KINGDOM
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000032073 [Member] \| CANADA
Holdings [Line Items]
Percent of Net Asset Value	16.00%
C000032073 [Member] \| AUSTRALIA
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000119766 [Member]
Holdings [Line Items]
Percent of Net Asset Value	108.00%
C000119766 [Member] \| Alphabet Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	39.00%
C000119766 [Member] \| Lam Research Corporation [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.00%
C000119766 [Member] \| Mastercard Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.00%
C000119766 [Member] \| Williams Sonoma Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.00%
C000119766 [Member] \| JPMorgan Chase And Co [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.00%
C000119766 [Member] \| Constellation Software Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000119766 [Member] \| Berkshire Hathaway Inc Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000119766 [Member] \| Microsoft Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000119766 [Member] \| The Progressive Corporation [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000119766 [Member] \| Qualys Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000119766 [Member] \| Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	35.00%
C000119766 [Member] \| Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.00%
C000119766 [Member] \| Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	39.00%
C000119766 [Member] \| Consumer Cylical [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000119766 [Member] \| UNITED STATES
Holdings [Line Items]
Percent of Net Asset Value	113.00%

C000032073 [Member]