Note 3 - Fair Value Measurements (Tables)

3 Months Ended

Sep. 30, 2015

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

(in millions)			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
September 30, 2015	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	6.1	$	6.1	$	—	$	—
Short-term investments available-for-sale		11.9		11.9		—		—
Long-term investments available-for-sale		9.1		—		9.1		—
Total	$	27.1	$	18.0	$	9.1	$	—

(in millions)			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
June 30, 2015	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	6.3	$	6.3	$	—	$	—
Short-term investments available-for-sale		12.9		12.9		—		—
Long-term investments available-for-sale		7.9		—		7.9		—
Total	$	27.1	$	19.2	$	7.9	$	—

Unrealized Gain (Loss) on Investments [Table Text Block]

(in millions)			Unrealized		Unrealized
September 30, 2015	At Cost		Gains		(Losses)		At Fair Value
Money market funds	$	6.1	$	—	$	—	$	6.1
Debt securities of U.S. government agencies		6.5		—		—		6.5
U.S. Treasury securities		9.5		—		—		9.5
Corporate notes		1.9		—		—		1.9
Certificates of deposit		3.1		—		—		3.1
Total	$	27.1	$	—	$	—	$	27.1

(in millions)			Unrealized		Unrealized
June 30, 2015	At Cost		Gains		(Losses)			At Fair Value
Money market funds	$	6.3	$	—	$	—		$	6.3
Debt securities of U.S. government agencies		6.5		—		—			6.5
U.S. Treasury securities		9.6		—		(0.1	)		9.5
Corporate notes		2.9		—		—			2.9
Certificates of deposit		1.9		—		—			1.9
Total	$	27.2	$	—	$	(0.1	)	$	27.1