Investments - Components of Company's Available-For-Sale Investments (Detail) (USD $)	Mar. 31, 2013	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	$ 7,979,758	$ 8,117,844
Available-for-sale securities, Gross Unrealized Gains	1,312,000	951,000
Available-for-sale securities, Gross Unrealized (Losses)	(100,000)	(245,000)
Available-for-sale securities, Market Value	9,192,008	8,824,311
Common stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	785,000	920,000
Available-for-sale securities, Gross Unrealized Gains	574,000	360,000
Available-for-sale securities, Gross Unrealized (Losses)	(8,000)	(52,000)
Available-for-sale securities, Market Value	1,351,000	1,228,000
Venture capital investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	168,000	168,000
Available-for-sale securities, Gross Unrealized (Losses)	(5,000)
Available-for-sale securities, Market Value	163,000	168,000
Offshore fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	5,000,000	5,000,000
Available-for-sale securities, Gross Unrealized (Losses)	(86,000)	(189,000)
Available-for-sale securities, Market Value	4,914,000	4,811,000
Mutual funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Cost	2,027,000	2,030,000
Available-for-sale securities, Gross Unrealized Gains	738,000	591,000
Available-for-sale securities, Gross Unrealized (Losses)	(1,000)	(4,000)
Available-for-sale securities, Market Value	$ 2,764,000	$ 2,617,000

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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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.

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