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Inverse Russell 2000 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%
Russell 2000® Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 12.81% 6.09% 9.62%
Class H      
Prospectus [Line Items]      
Average Annual Return, Percent (25.73%) (18.56%) (26.45%)
Class H | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent (26.90%) (19.30%) (26.81%)
Class H | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent (15.26%) (12.74%) (12.18%)
[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 Russell 2000® Index measures the performance of the small-cap segment of the U.S. equity universe and includes approximately 2,000 of the smallest securities based on a combination of their market cap and current index membership. The Index is a subset of the Russell 3000® Index which is designed to represent approximately 98% of the investable U.S. equity market.