Note 6 - Cash, Cash Equivalents and Marketable Securities Recorded at Fair Value (Details) - Summary of Available-For-Sale Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 11,803	$ 13,813
Unrealized Gains	14	16
Unrealized Losses		(12)
Fair Value	11,817	13,817
Cash & Cash Equivalents	1,644	1,966
Short-term Marketable Securities	6,879	6,305
Long-term Marketable Securities	3,294	5,546
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	757	1,257
Fair Value	757	1,257
Cash & Cash Equivalents	757	1,257
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	887	709
Fair Value	887	709
Cash & Cash Equivalents	887	709
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	494	503
Fair Value	494	503
Short-term Marketable Securities	494	503
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	540	544
Unrealized Gains	1
Unrealized Losses		(1)
Fair Value	541	543
Long-term Marketable Securities	541	543
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	4,296	4,915
Unrealized Gains	2	1
Unrealized Losses		(11)
Fair Value	4,298	4,905
Short-term Marketable Securities	2,763	2,745
Long-term Marketable Securities	1,535	2,160
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	4,787	5,728
Unrealized Gains	11	15
Fair Value	4,798	5,743
Short-term Marketable Securities	3,580	2,900
Long-term Marketable Securities	1,218	2,843
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	42	127
Fair Value	42	127
Short-term Marketable Securities	42	127
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost		30
Fair Value		30
Short-term Marketable Securities		30
Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	2,138	2,469
Fair Value	2,138	2,469
Cash & Cash Equivalents	1,644	1,966
Short-term Marketable Securities	494	503
Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	9,665	11,344
Unrealized Gains	14	16
Unrealized Losses		(12)
Fair Value	9,679	11,348
Short-term Marketable Securities	6,385	5,802
Long-term Marketable Securities	$ 3,294	$ 5,546