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v2.4.1.9

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Summary of Deferred tax assets and liabilities |  |
Stock-based compensation | $ 5,433,419 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | $ 4,433,293 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Accrued incentive compensation | 2,964,688 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits | 4,075,735 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits
Unrealized (gains) losses | (2,436,006)dhil_DeferredTaxAssetsUnrealizedGainLossOnTradingSecurities | (316,926)dhil_DeferredTaxAssetsUnrealizedGainLossOnTradingSecurities
Other assets and liabilities | (303,109)dhil_DeferredTaxAssetsLiabilitiesOther | (128,677)dhil_DeferredTaxAssetsLiabilitiesOther
Net deferred tax assets | $ 5,658,992 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 8,063,425 us-gaap_DeferredTaxAssetsLiabilitiesNet

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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