Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type [Line Items]
Amortized Cost	$ 11,847	$ 13,495
Unrealized Gain	16	13
Unrealized Loss	(12)	(4)
Fair Value	11,851	13,504
US Treasury Obligations of US Government Agencies [Member]
Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type [Line Items]
Amortized Cost	1,047	3,277
Unrealized Gain		1
Unrealized Loss	(1)	(1)
Fair Value	1,046	3,277
US Government-sponsored Enterprises Debt Securities [Member]
Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type [Line Items]
Amortized Cost	30	2,525
Unrealized Loss		(2)
Fair Value	30	2,523
Municipal Securities [Member]
Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type [Line Items]
Amortized Cost	5,728	3,471
Unrealized Gain	15	6
Fair Value	5,743	3,477
Asset-backed Securities [Member]
Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type [Line Items]
Amortized Cost	127	1,629
Unrealized Gain		1
Fair Value	127	1,630
Corporate Bond Securities [Member]
Note 2 - Marketable Securities (Details) - Marketable Securities by Security Type [Line Items]
Amortized Cost	4,915	2,593
Unrealized Gain	1	5
Unrealized Loss	(11)	(1)
Fair Value	$ 4,905	$ 2,597