Note 6 - Cash, Cash Equivalents and Marketable Securities (Detail) - Summary of Investments With Unrealized Losses (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012
Less Than 12 Months, Fair Value	$ 2,688	$ 4,127
Less Than 12 Months, Unrealized Loss	(5)	(1)
12 Months or Greater, Fair Value	1,592	4,270
12 Months or Greater, Unrealized Loss	(1)	(3)
Total, Fair Value	4,280	8,397
Total, Unrealized Loss	(6)	(4)
Corporate Debt Securities [Member]
Less Than 12 Months, Fair Value	2,147	1,696
12 Months or Greater, Fair Value	814	901
12 Months or Greater, Unrealized Loss	(1)	(1)
Total, Fair Value	2,961	2,597
Total, Unrealized Loss	(1)	(1)
Collateralized Mortgage Backed Securities [Member]
Less Than 12 Months, Fair Value	541
Less Than 12 Months, Unrealized Loss	(5)
12 Months or Greater, Fair Value	778
Total, Fair Value	1,319
Total, Unrealized Loss	(5)
US Treasury and Government [Member]
Less Than 12 Months, Fair Value		2,262
12 Months or Greater, Fair Value		1,015
12 Months or Greater, Unrealized Loss		(1)
Total, Fair Value		3,277
Total, Unrealized Loss		(1)
Collateralized Mortgage Obligations [Member]
Less Than 12 Months, Fair Value		169
Less Than 12 Months, Unrealized Loss		(1)
12 Months or Greater, Fair Value		2,354
12 Months or Greater, Unrealized Loss		(1)
Total, Fair Value		2,523
Total, Unrealized Loss		$ (2)