Note I - Income Taxes (Details Textual) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2015	Mar. 31, 2015
Tax Adjustments, Settlements, and Unusual Provisions	$ 0	$ 0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent	26.70%	24.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		34.00%
Domestic Tax Authority [Member] | Earliest Tax Year [Member]
Open Tax Year		2010
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Open Tax Year		2007
Foreign Tax Authority [Member] | Earliest Tax Year [Member] | Swiss Federal Tax Administration (FTA) [Member]
Open Tax Year		2013