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Note 6 - Investment Advisory Agreements (Details Textual) | 12 Months Ended
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Sep. 30, 2023
Number of Open End Mutual Funds | 17
Notice Period for Termination of Agreement (Day) | 60 days

X
- Definition Duration of notice period to terminate agreement. + References No definition available. + Details
Name: | hnna_NoticePeriodForTerminationOfAgreement
Namespace Prefix: | hnna_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents number of open end mutual funds. + References No definition available. + Details
Name: | hnna_NumberOfOpenEndMutualFunds
Namespace Prefix: | hnna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant