Note 6 - Cash, Cash Equivalents and Marketable Securities (Detail) (USD $)	6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Marketable Securities, Realized Gain (Loss)	$ (34,000)	$ (38,000)
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	$ 5,000	$ (47,000)