Note 1 - Accounting Policies (Detail) - Assets and liabilities measured at fair value on a recurring basis (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Short-term Marketable Securities	$ 7,135	$ 10,713
Long-term Marketable Securities	6,369	6,981
US Government Corporations and Agencies Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	753	6,143
Unrealized Gains	1	13
Fair Value	754	6,156
Short-term Marketable Securities	754	5,394
Long-term Marketable Securities		762
Domestic Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	2,593	3,181
Unrealized Gains	5	5
Unrealized Losses	(1)
Fair Value	2,597	3,186
Short-term Marketable Securities	1,696	2,256
Long-term Marketable Securities	901	930
Municipal Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	3,471
Unrealized Gains	6
Fair Value	3,477
Short-term Marketable Securities	1,752
Long-term Marketable Securities	1,725
Asset-backed Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	1,629	2,964
Unrealized Gains	1	6
Fair Value	1,630	2,970
Short-term Marketable Securities	1,256	467
Long-term Marketable Securities	374	2,503
Mortgage-backed Securities, Issued by Private Enterprises [Member] \| Fair Value, Inputs, Level 2 [Member] \| Total [Member]
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
Mortgage-backed Securities, Issued by Private Enterprises [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	2,525	2,826
Unrealized Gains		8
Unrealized Losses	(2)	(1)
Fair Value	2,523	2,833
Short-term Marketable Securities	169	187
Long-term Marketable Securities	2,354	2,646
Subtotal [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	10,971	15,114
Unrealized Gains	13	32
Unrealized Losses	(3)	(1)
Fair Value	10,981	15,145
Short-term Marketable Securities	5,627	8,304
Long-term Marketable Securities	5,354	6,841
Total [Member] \| Fair Value, Inputs, Level 2 [Member]
Adjusted Cost		22,625
Unrealized Gains		40
Unrealized Losses		(1)
Cash & Cash Equivalents		4,970
Fair Value		22,664
Short-term Marketable Securities		10,713
Long-term Marketable Securities		6,981
Fair Value, Inputs, Level 1 [Member] \| Cash [Member]
Adjusted Cost	635	865
Cash & Cash Equivalents	635	865
Fair Value	635	865
Fair Value, Inputs, Level 1 [Member] \| Money Market Funds [Member]
Adjusted Cost	6,746	4,105
Cash & Cash Equivalents	6,746	4,105
Fair Value	6,746	4,105
Fair Value, Inputs, Level 1 [Member] \| US Treasury Securities [Member]
Adjusted Cost	2,524	2,541
Unrealized Gains		8
Unrealized Losses	(1)
Fair Value	2,523	2,549
Short-term Marketable Securities	1,508	2,409
Long-term Marketable Securities	1,015	140
Fair Value, Inputs, Level 1 [Member] \| Total [Member]
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
Fair Value, Inputs, Level 1 [Member] \| Subtotal [Member]
Adjusted Cost		7,511
Unrealized Gains		8
Cash & Cash Equivalents		4,970
Fair Value		7,519
Short-term Marketable Securities		2,409
Long-term Marketable Securities		$ 140

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

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This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

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