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Fair Value Disclosures - Fair Value Measurements on Recurring Basis (Detail) (USD $) | Dec. 31, 2013 | Jun. 30, 2013
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Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | $ 18,640,758 | $ 4,758,220
Available-for-sale, market value | 7,343,679 | 9,053,111
Total investments, market value | 25,984,437 | 13,811,331
Common stock |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 16,000 |
Available-for-sale, market value | 2,732,000 | 1,394,000
Preferred stock |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 197,000 |
Corporate debt |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 1,492,000 |
Venture capital investments |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 163,000 |
Offshore funds |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 877,000 |
Available-for-sale, market value |  | 4,712,000
Mutual funds |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 17,748,000 |
Available-for-sale, market value | 2,759,000 | 2,784,000
Quoted Prices (Level 1) | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 17,764,000 |
Available-for-sale, market value | 5,755,000 |
Total investments, market value | 23,519,000 |
Quoted Prices (Level 1) | Common stock | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 16,000 |
Available-for-sale, market value | 2,638,000 |
Quoted Prices (Level 1) | Preferred stock | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 106,000 |
Quoted Prices (Level 1) | Corporate debt | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 252,000 |
Quoted Prices (Level 1) | Venture capital investments | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 0 |
Quoted Prices (Level 1) | Offshore funds | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Quoted Prices (Level 1) | Mutual funds | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 17,748,000 |
Available-for-sale, market value | 2,759,000 |
Significant Other Inputs (Level 2) | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 877,000 |
Available-for-sale, market value | 990,000 |
Total investments, market value | 1,867,000 |
Significant Other Inputs (Level 2) | Common stock | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Available-for-sale, market value | 0 |
Significant Other Inputs (Level 2) | Preferred stock | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 0 |
Significant Other Inputs (Level 2) | Corporate debt | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 990,000 |
Significant Other Inputs (Level 2) | Venture capital investments | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 0 |
Significant Other Inputs (Level 2) | Offshore funds | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 877,000 |
Significant Other Inputs (Level 2) | Mutual funds | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Available-for-sale, market value | 0 |
Significant Unobservable Inputs (Level 3) | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Available-for-sale, market value | 598,000 |
Total investments, market value | 598,000 |
Significant Unobservable Inputs (Level 3) | Common stock | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Available-for-sale, market value | 94,000 |
Significant Unobservable Inputs (Level 3) | Preferred stock | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 91,000 |
Significant Unobservable Inputs (Level 3) | Corporate debt | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 250,000 |
Significant Unobservable Inputs (Level 3) | Venture capital investments | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale, market value | 163,000 |
Significant Unobservable Inputs (Level 3) | Offshore funds | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Significant Unobservable Inputs (Level 3) | Mutual funds | Recurring basis |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Trading securities, at fair value | 0 |
Available-for-sale, market value | $ 0 |

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- Definition Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer. + 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 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 + Details
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