Note 6 - Cash, Cash Equivalents and Marketable Securities Recorded at Fair Value (Details) - Summary of Investments With Unrealized Losses (USD $) In Thousands, unless otherwise specified	12 Months Ended		3 Months Ended
	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013 US Government Agencies Debt Securities [Member] Less Than 12 Months [Member]	Sep. 30, 2013 US Government Agencies Debt Securities [Member] Greater Than 12 Months [Member]	Sep. 30, 2013 US Government Agencies Debt Securities [Member] Total [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Less Than 12 Months [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Greater Than 12 Months [Member]	Sep. 30, 2013 Corporate Debt Securities [Member] Total [Member]	Sep. 30, 2013 Less Than 12 Months [Member]	Sep. 30, 2013 Greater Than 12 Months [Member]	Sep. 30, 2013 Total [Member]
Note 6 - Cash, Cash Equivalents and Marketable Securities Recorded at Fair Value (Details) - Summary of Investments With Unrealized Losses [Line Items]
Fair Value	$ 13,817	$ 11,817	$ 0	$ 543	$ 543	$ 2,745	$ 2,160	$ 4,905	$ 2,745	$ 2,703	$ 5,448
Unrealized Loss	$ (12)		$ 0	$ (1)	$ (1)	$ (3)	$ (8)	$ (11)	$ (3)	$ (9)	$ (12)