Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Unrealized Gains	$ 16	$ 13
Unrealized Losses	12	4
Fair Value	11,851	13,504
Short-term Marketable Securities	6,305	7,135
Long-term Marketable Securities	5,546	6,369
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	544	753
Unrealized Gains		1
Unrealized Losses	(1)
Fair Value	543	754
Short-term Marketable Securities		754
Long-term Marketable Securities	543
Domestic Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	4,915	2,593
Unrealized Gains	1	5
Unrealized Losses	(11)	(1)
Fair Value	4,905	2,597
Short-term Marketable Securities	2,745	1,696
Long-term Marketable Securities	2,160	901
Municipal Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	5,728	3,471
Unrealized Gains	15	6
Fair Value	5,743	3,477
Short-term Marketable Securities	2,900	1,752
Long-term Marketable Securities	2,843	1,725
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	127	1,629
Unrealized Gains		1
Fair Value	127	1,630
Short-term Marketable Securities	127	1,256
Long-term Marketable Securities		374
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	30	2,525
Unrealized Losses		(2)
Fair Value	30	2,523
Short-term Marketable Securities	30	169
Long-term Marketable Securities		2,354
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 2 [Member] | Total [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost		20,876
Unrealized Gains		13
Unrealized Losses		(4)
Cash & Cash Equivalents		7,381
Fair Value		20,885
Short-term Marketable Securities		7,135
Long-term Marketable Securities		6,369
Subtotal [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	11,344	10,971
Unrealized Gains	16	13
Unrealized Losses	(12)	(3)
Fair Value	11,348	10,981
Short-term Marketable Securities	5,802	5,627
Long-term Marketable Securities	5,546	5,354
Total [Member] | Fair Value, Inputs, Level 2 [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	13,813
Unrealized Gains	16
Unrealized Losses	(12)
Cash & Cash Equivalents	1,966
Fair Value	13,817
Short-term Marketable Securities	6,305
Long-term Marketable Securities	5,546
Fair Value, Inputs, Level 1 [Member] | Cash [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	1,257	635
Cash & Cash Equivalents	1,257	635
Fair Value	1,257	635
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	709	6,746
Cash & Cash Equivalents	709	6,746
Fair Value	709	6,746
Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	503	2,524
Unrealized Losses		(1)
Fair Value	503	2,523
Short-term Marketable Securities	503	1,508
Long-term Marketable Securities		1,015
Fair Value, Inputs, Level 1 [Member] | Subtotal [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost	2,469
Cash & Cash Equivalents	1,966
Fair Value	2,469
Short-term Marketable Securities	503
Fair Value, Inputs, Level 1 [Member] | Total [Member]
Note 1 - Accounting Policies (Details) - Assets and Liabilities at Fair Value on a Recurring Basis [Line Items]
Adjusted Cost		9,905
Unrealized Losses		(1)
Cash & Cash Equivalents		7,381
Fair Value		9,904
Short-term Marketable Securities		1,508
Long-term Marketable Securities		$ 1,015