Expense Example (Science & Technology Trust, USD $)	12 Months Ended
May 01, 2011
Series I, Science & Technology Trust
Expense Example:
Year 1	$ 120
Year 3	375
Year 5	649
Year 10	1,432
Series II, Science & Technology Trust
Expense Example:
Year 1	140
Year 3	437
Year 5	755
Year 10	1,657
Series NAV, Science & Technology Trust
Expense Example:
Year 1	115
Year 3	359
Year 5	622
Year 10	$ 1,375

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The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.

+ References

Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 4
-Subsection instructions

+ Details

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- Definition

+ References

Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 1
-Subparagraph 2
-Subsection example

+ Details

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- Definition

+ References

Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 1
-Subparagraph 2
-Subsection example

+ Details

Name:	rr_ExpenseExampleYear05
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- Definition

+ References

Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 1
-Subparagraph 2
-Subsection example

+ Details

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