v3.25.4

Alger Spectra Fund Shareholder Fees	Oct. 31, 2025 USD ($)
Class I Shares [Member] \| Alger Spectra Fund \| Class I
Prospectus [Line Items]
Shareholder Fee, Other	$ 0

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- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a

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- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
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-Paragraph 2

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