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Subsequent Event - Future Amortization Expense (Detail) (USD $)	Sep. 30, 2013
Subsequent Event [Line Items]
2014	$ 48,475
2015	48,475
2016	48,475
2017	48,475
2018	3,518
Total	197,418
Subsequent Event [Member]
Subsequent Event [Line Items]
Total	345,980
Subsequent Event [Member] | Notes [Member]
Subsequent Event [Line Items]
2014	79,287
2015	86,495
2016	86,495
2017	86,495
2018	7,208
Total	$ 345,980

X

- Definition

Debt issuance cost amortization expense in next twelve months.

+ References

No definition available.

+ Details

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X

- Definition

Debt issuance cost amortization expense year five.

+ References

No definition available.

+ Details

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X

- Definition

Debt issuance cost amortization expense year four.

+ References

No definition available.

+ Details

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Namespace Prefix:	hnna_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Debt issuance cost amortization expense year three.

+ References

No definition available.

+ Details

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Namespace Prefix:	hnna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt issuance cost amortization expense year two.

+ References

No definition available.

+ Details

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Namespace Prefix:	hnna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Details

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X

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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