Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	$ 11,851	$ 13,504
Unrealized Loss	12	4
US Treasury Obligations of US Government Agencies [Member] | Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	0	2,262
US Treasury Obligations of US Government Agencies [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	1,046	3,277
Unrealized Loss	1	1
US Treasury Obligations of US Government Agencies [Member] | Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Unrealized Loss	0	0
US Treasury Obligations of US Government Agencies [Member] | Greater Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	543	1,015
Unrealized Loss	(1)	(1)
US Treasury Obligations of US Government Agencies [Member] | Total [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	543	3,277
Unrealized Loss	(1)	(1)
Corporate Bond Securities [Member] | Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	2,745	1,696
Corporate Bond Securities [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	4,905	2,597
Unrealized Loss	11	1
Corporate Bond Securities [Member] | Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Unrealized Loss	(3)	0
Corporate Bond Securities [Member] | Greater Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	2,160	901
Unrealized Loss	(8)	(1)
Corporate Bond Securities [Member] | Total [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	4,905	2,597
Unrealized Loss	(11)	(1)
US Government-sponsored Enterprises Debt Securities [Member] | Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value		169
US Government-sponsored Enterprises Debt Securities [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	30	2,523
Unrealized Loss		2
US Government-sponsored Enterprises Debt Securities [Member] | Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Unrealized Loss		(1)
US Government-sponsored Enterprises Debt Securities [Member] | Greater Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value		2,354
Unrealized Loss		(1)
US Government-sponsored Enterprises Debt Securities [Member] | Total [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value		2,523
Unrealized Loss		(2)
Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	2,745	4,127
Less Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Unrealized Loss	(3)	(1)
Greater Than 12 Months [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	2,703	4,270
Unrealized Loss	(9)	(3)
Total [Member]
Note 2 - Marketable Securities (Details) - Gross Unrealized Losses and Fair Value of the Company’s Investments [Line Items]
Fair Value	5,448	8,397
Unrealized Loss	$ (12)	$ (4)