Note 8 - Income Taxes (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Effective Income Tax Rate Reconciliation, Percent	30.50%	36.90%	39.30%	43.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount, Use of Tax Loss Carryforwards			$ (66,000)	$ (67,000)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount, Expiration of Statute of Limitations			(42,000)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount, Return to Provision Adjustment			(332,000)	(109,000)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount				$ 278,000