Note 6 - Cash, Cash Equivalents and Marketable Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Marketable Securities, Realized Gain (Loss)			$ (47,000)	$ (54,000)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ 9,000	$ 28,000	$ 14,000	$ (19,000)