Note J - Treasury Stock (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	May. 11, 2015	Feb. 06, 2015	Jun. 02, 2011
2015 Increase [Member]
Stock Repurchase Program, Authorized Amount			$ 2,000,000	$ 1,000,000
Treasury Stock, Shares, Acquired	29,262	0
Stock Repurchase Program, Authorized Amount			$ 5,000,000	$ 3,000,000	$ 2,000,000
Treasury Stock Acquired, Average Cost Per Share	$ 5.89
Treasury Stock, Value, Acquired, Cost Method	$ 172,000