Note 4 - Fair Value Measurements - Liability Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - Contingent Consideration [Member] - Fair Value, Inputs, Level 3 [Member] $ in Millions	3 Months Ended
	Sep. 30, 2017 USD ($)
Fair value at the beginning of period	$ 68.4
Payments	(35.0)
Change in fair value of contingent consideration	7.5
Fair value at the end of period	$ 40.9