Statements of Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Revenue
Investment advisory fees	$ 9,926us-gaap_InvestmentAdvisoryFees	$ 8,083us-gaap_InvestmentAdvisoryFees	$ 19,399us-gaap_InvestmentAdvisoryFees	$ 15,776us-gaap_InvestmentAdvisoryFees
Shareholder service fees	632us-gaap_ServicingFees	227us-gaap_ServicingFees	893us-gaap_ServicingFees	455us-gaap_ServicingFees
Total revenue	10,558us-gaap_Revenues	8,310us-gaap_Revenues	20,292us-gaap_Revenues	16,231us-gaap_Revenues
Operating expenses
Compensation and benefits	2,310	1,877	4,379	3,647
General and administrative	1,266us-gaap_GeneralAndAdministrativeExpense	1,207us-gaap_GeneralAndAdministrativeExpense	2,648us-gaap_GeneralAndAdministrativeExpense	2,255us-gaap_GeneralAndAdministrativeExpense
Mutual fund distribution	758hnna_DistributionExpense	523hnna_DistributionExpense	1,620hnna_DistributionExpense	1,096hnna_DistributionExpense
Sub-advisor fees	1,739us-gaap_SubadvisoryFeesForMutualFunds	1,464us-gaap_SubadvisoryFeesForMutualFunds	3,333us-gaap_SubadvisoryFeesForMutualFunds	2,859us-gaap_SubadvisoryFeesForMutualFunds
Amortization and depreciation	65us-gaap_DepreciationAndAmortization	60us-gaap_DepreciationAndAmortization	130us-gaap_DepreciationAndAmortization	120us-gaap_DepreciationAndAmortization
Total operating expenses	6,138us-gaap_OperatingExpenses	5,131us-gaap_OperatingExpenses	12,110us-gaap_OperatingExpenses	9,977us-gaap_OperatingExpenses
Operating income	4,420us-gaap_OperatingIncomeLoss	3,179us-gaap_OperatingIncomeLoss	8,182us-gaap_OperatingIncomeLoss	6,254us-gaap_OperatingIncomeLoss
Interest expense	250us-gaap_InterestExpense	286us-gaap_InterestExpense	514us-gaap_InterestExpense	532us-gaap_InterestExpense
Other expense (income), net	(1)us-gaap_OtherNonoperatingIncomeExpense	(1)us-gaap_OtherNonoperatingIncomeExpense	(1)us-gaap_OtherNonoperatingIncomeExpense	(1)us-gaap_OtherNonoperatingIncomeExpense
Income before income tax expense	4,171	2,894	7,669	5,723
Income tax expense	1,577us-gaap_IncomeTaxExpenseBenefit	1,135us-gaap_IncomeTaxExpenseBenefit	3,009us-gaap_IncomeTaxExpenseBenefit	2,507us-gaap_IncomeTaxExpenseBenefit
Net income	$ 2,594us-gaap_NetIncomeLoss	$ 1,759us-gaap_NetIncomeLoss	$ 4,660us-gaap_NetIncomeLoss	$ 3,216us-gaap_NetIncomeLoss
Earnings per share:
Basic	$ 0.45us-gaap_EarningsPerShareBasic	$ 0.31us-gaap_EarningsPerShareBasic	$ 0.80us-gaap_EarningsPerShareBasic	$ 0.55us-gaap_EarningsPerShareBasic
Diluted	$ 0.44us-gaap_EarningsPerShareDiluted	$ 0.30us-gaap_EarningsPerShareDiluted	$ 0.78us-gaap_EarningsPerShareDiluted	$ 0.55us-gaap_EarningsPerShareDiluted
Weighted average shares outstanding:
Basic	5,776,165	5,724,821	5,861,679	5,816,649
Diluted	5,862,559	5,805,340	5,956,241	5,893,427

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