Note 2 - Marketable Securities (Detail) - Summary of gross unrealized losses and fair value of the Company’s investments: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Less Than 12 Months [Member] | US Treasury Obligations of US Government Agencies [Member]
Fair Value	$ 2,262
Less Than 12 Months [Member] | Corporate Bond Securities [Member]
Fair Value	1,696
Less Than 12 Months [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value	169	187
Less Than 12 Months [Member]
Fair Value	4,127	187
US Treasury Obligations of US Government Agencies [Member] | Greater Than 12 Months [Member]
Fair Value	1,015
Unrealized Loss	(1)
US Treasury Obligations of US Government Agencies [Member] | Total [Member]
Fair Value	3,277
Unrealized Loss	(1)
US Treasury Obligations of US Government Agencies [Member]
Fair Value	3,277	8,705
Unrealized Loss	(1)
Corporate Bond Securities [Member] | Greater Than 12 Months [Member]
Fair Value	901
Unrealized Loss	(1)
Corporate Bond Securities [Member] | Total [Member]
Fair Value	2,597
Unrealized Loss	(1)
Corporate Bond Securities [Member]
Fair Value	2,597	3,186
Unrealized Loss	(1)
US Government-sponsored Enterprises Debt Securities [Member] | Less Than 12 Months [Member]
Unrealized Loss	(1)	(1)
US Government-sponsored Enterprises Debt Securities [Member] | Greater Than 12 Months [Member]
Fair Value	2,354	2,646
Unrealized Loss	(1)
US Government-sponsored Enterprises Debt Securities [Member] | Total [Member]
Fair Value	2,523	2,833
Unrealized Loss	(2)	(1)
US Government-sponsored Enterprises Debt Securities [Member]
Fair Value	2,523	2,833
Unrealized Loss	(2)	(1)
Less Than 12 Months [Member]
Unrealized Loss	(1)	(1)
Greater Than 12 Months [Member]
Fair Value	4,270	2,646
Unrealized Loss	(3)
Total [Member]
Fair Value	8,397	2,833
Unrealized Loss	$ (4)	$ (1)