Note 15 - Income Taxes - Reconciliation of Income Tax Rate (Details)	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Provision for income taxes at the anticipated annual tax rate	28.90%	32.00%	28.90%	30.40%
Enactment of tax law changes			(22.80%)
Uncertain tax positions	5.40%	4.20%	0.70%	(2.40%)
Difference between deferred and current tax rate related to the impairment of goodwill			12.30%
Other		(2.20%)		(1.70%)
Tax impact related to share based compensation	1.60%	9.30%	(0.50%)	(3.60%)
Effective tax rate	35.90%	43.30%	18.60%	22.70%