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Inverse Dow 2x Strategy Fund Average Annual Total Returns - Class H [Member]
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 17.88% 14.42% 14.82%
Dow Jones Industrial Average®(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 14.92% 11.58% 13.11%
Class H      
Prospectus [Line Items]      
Average Annual Return, Percent (21.58%) (18.30%) (25.21%)
Class H | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent (23.07%) (18.91%) (25.50%)
Class H | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent (12.78%) (12.59%) (11.98%)
[1] The S&P 500® Index is a broad-based index that includes 500 leading companies and covers approximately 80% of available market capitalization. The Index is widely regarded as the best single gauge of large-cap U.S. equities.
[2] The Dow Jones Industrial Average® (The Dow®) is a price-weighted index of 30 U.S. blue-chip companies that covers all industries except transportation and utilities.