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Inverse NASDAQ-100 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%
NASDAQ-100 Index®(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 21.03% 15.30% 19.70%
Class H      
Prospectus [Line Items]      
Average Annual Return, Percent (35.22%) (30.29%) (36.87%)
Class H | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent (37.74%) (31.41%) (37.41%)
Class H | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent (20.84%) (18.47%) (13.10%)
[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 NASDAQ-100 Index® is a modified capitalization-weighted index designed to measure the performance of 100 of the largest Nasdaq-listed non-financial companies. The Index includes 100 of the largest domestic and international non-financial companies listed on The Nasdaq Stock Market based on market capitalization. The Index reflects companies across major industry groups including computer hardware and software, telecommunications, retail/wholesale trade and biotechnology. It does not contain securities of financial companies including investment companies.