Note 4 - Fair Value Measurements (Tables)

3 Months Ended

Sep. 30, 2015

Notes Tables

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

	As of September 30, 2015
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	7,138	$	—	$	—	$	7,138
Short-term investments:
Corporate debt securities		—		11,444		—		11,444
Long-term investments:
Corporate debt securities		—		1,450		—		1,450
Total assets at fair value	$	7,138	$	12,894	$	—	$	20,032

	As of June 30, 2015
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	6,399	$	—	$	—	$	6,399
Corporate debt securities		—		668		—		668
Short-term investments:
Corporate debt securities		—		12,972		—		12,972
Long-term investments:
Corporate debt securities		—		3,970		—		3,970
Total assets at fair value	$	6,399	$	17,610	$	—	$	24,009