Note I - Income Taxes (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2016
Earliest Tax Year [Member] | Domestic Tax Authority [Member]
Open Tax Year		2009
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Open Tax Year		2007
Earliest Tax Year [Member] | Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member]
Open Tax Year		2013
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent	34.40%	32.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		34.00%