Fair Value Disclosures - Fair Value Measurements on Recurring Basis (Detail) (USD $)	Mar. 31, 2014		Jun. 30, 2013
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	$ 18,645,573	[1]	$ 4,758,220	[1]
Available-for-sale, fair value	6,240,626	[2],[3]	9,053,111	[2],[3]
Total Investments Measured at Fair Value on a Recurring Basis	25,300,000
Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	18,645,573		4,758,220
Available-for-sale, fair value	6,240,626		9,053,111
Total Investments Measured at Fair Value on a Recurring Basis	24,887,000		13,811,000
Common stock - Domestic
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	788,000	[3]	579,000	[3]
Common stock - Domestic | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	788,000		579,000
Common stock - International
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	1,355,000	[3]	815,000	[3]
Common stock - International | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	1,355,000		815,000
Corporate debt
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	1,724,000	[3]
Corporate debt | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	1,724,000
Offshore fund
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	874,000	[1]	786,000	[1]
Available-for-sale, fair value			4,712,000	[3]
Offshore fund | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	874,000		786,000
Available-for-sale, fair value			4,712,000
Mutual funds - Emerging markets
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value			360,000	[1]
Mutual funds - Emerging markets | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value			360,000
Mutual funds - Fixed income
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,300,000	[1]	3,191,000	[1]
Available-for-sale, fair value	1,481,000	[3]	1,004,000	[3]
Mutual funds - Fixed income | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,300,000		3,191,000
Available-for-sale, fair value	1,481,000		1,004,000
Mutual funds - Domestic equity
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	455,000	[1]	399,000	[1]
Available-for-sale, fair value	658,000	[3]	1,766,000	[3]
Mutual funds - Domestic equity | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	455,000		399,000
Available-for-sale, fair value	658,000		1,766,000
Other
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,000	[1]	22,000	[1]
Available-for-sale, fair value	235,000	[3]	177,000	[3]
Other | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,000		22,000
Available-for-sale, fair value	235,000		177,000
Quoted Prices (Level 1) | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,772,000		3,972,000
Available-for-sale, fair value	4,862,000		4,083,000
Total Investments Measured at Fair Value on a Recurring Basis	22,634,000		8,055,000
Quoted Prices (Level 1) | Common stock - Domestic | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	788,000		579,000
Quoted Prices (Level 1) | Common stock - International | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	1,355,000		720,000
Quoted Prices (Level 1) | Corporate debt | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	345,000
Quoted Prices (Level 1) | Offshore fund | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value			0
Quoted Prices (Level 1) | Mutual funds - Emerging markets | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value			360,000
Quoted Prices (Level 1) | Mutual funds - Fixed income | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,300,000		3,191,000
Available-for-sale, fair value	1,481,000		1,004,000
Quoted Prices (Level 1) | Mutual funds - Domestic equity | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	455,000		399,000
Available-for-sale, fair value	658,000		1,766,000
Quoted Prices (Level 1) | Other | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	17,000		22,000
Available-for-sale, fair value	235,000		14,000
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	874,000		786,000
Available-for-sale, fair value	1,129,000		4,712,000
Total Investments Measured at Fair Value on a Recurring Basis	2,003,000		5,498,000
Significant Other Inputs (Level 2) | Common stock - Domestic | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	0		0
Significant Other Inputs (Level 2) | Common stock - International | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	0		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, fair value	1,129,000
Significant Other Inputs (Level 2) | Offshore fund
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value			4,712,205
Significant Other Inputs (Level 2) | Offshore fund | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	874,000		786,000
Available-for-sale, fair value			4,712,000
Significant Other Inputs (Level 2) | Mutual funds - Emerging markets | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value			0
Significant Other Inputs (Level 2) | Mutual funds - Fixed income | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value	0		0
Significant Other Inputs (Level 2) | Mutual funds - Domestic equity | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value	0		0
Significant Other Inputs (Level 2) | Other | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value	0		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		0
Available-for-sale, fair value	250,000		258,000
Total Investments Measured at Fair Value on a Recurring Basis	250,000		258,000
Significant Unobservable Inputs (Level 3) | Common stock - Domestic | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	0		0
Significant Unobservable Inputs (Level 3) | Common stock - International | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Available-for-sale, fair value	0		95,000
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, fair value	250,000
Significant Unobservable Inputs (Level 3) | Offshore fund | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value			0
Significant Unobservable Inputs (Level 3) | Mutual funds - Emerging markets | 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 - Fixed income | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value	0		0
Significant Unobservable Inputs (Level 3) | Mutual funds - Domestic equity | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value	0		0
Significant Unobservable Inputs (Level 3) | Other | Recurring basis
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Trading securities, at fair value	0		0
Available-for-sale, fair value	$ 0		$ 163,000

[1] Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.

[2] Net unrealized gains on available-for-sale securities gross and net of tax as of March 31, 2014, are $1,129 and $745, respectively, and as of June 30, 2013, are $988 and $652, respectively.

[3] Unrealized gains and losses on available-for-sale securities are excluded from earnings and recorded in other comprehensive income as a separate component of shareholders’ equity until realized.