Note 3 - Fair Value Measurements (Tables)

3 Months Ended

Sep. 30, 2016

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 , 201 6	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	9.4	$	9.4	$	—	$	—
Short-term investments available-for-sale		12.4		6.0		6.4		—
Total	$	21.8	$	15.4	$	6.4	$	—

(in millions)			Quoted Prices in Active Markets for  Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
June 30, 201 6	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	1.5	$	1.5	$	—	$	—
Short-term investments available-for-sale	19.3			10.0		9.3		—
Total	$	20.8	$	11.5	$	9.3	$	—

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

(in millions)			Unrealized		Unrealized
September 30, 2016	At Cost		Gains		(Losses)		At Fair Value
Money market funds	$	9.4	$	—	$	—	$	9.4
Debt securities of U.S. government agencies		2.0		—		—		2.0
U.S. Treasury securities		4.0		—		—		4.0
Corporate notes		2.0		—		—		2.0
Certificates of deposit		4.4		—		—		4.4
Total	$	21.8	$	—	$	—	$	21.8

(in millions)			Unrealized		Unrealized
June 30, 201 6	At Cost		Gains		(Losses)		At Fair Value
Money market funds	$	1.5	$	—	$	—	$	1.5
Debt securities of U.S. government agencies		2.0		—		—		2.0
U.S. Treasury securities		7.0		—		—		7.0
Corporate notes		2.9		0.1		—		3.0
Certificates of deposit		7.3		—		—		7.3
Total	$	20.7	$	0.1	$	—	$	20.8