Investments - Investment Income (Loss) Reflected in Earnings (Detail) (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Marketable Securities Gain Loss [Abstract]
Realized gains on sales of available-for-sale securities	$ 875,346
Unrealized gains on trading securities	108,704	171,581
Realized foreign currency gains (losses)	4,979	(25)
Dividend and interest income	71,621	29,095
Total Investment Income	$ 1,060,650	$ 200,651