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Note 1 - Basis of Financial Statement Presentation (Details Textual)	Dec. 31, 2025
Open-end Mutual Funds [Member]
Number of Funds	16
Exchange-traded Fund [Member]
Number of Funds	1

X

- Definition

Represents the number of funds.

+ References

No definition available.

+ Details

Name:	hnna_NumberOfFunds
Namespace Prefix:	hnna_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_ProductOrServiceAxis=hnna_OpenendMutualFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=hnna_ExchangetradedFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: