Note J - Treasury Stock (Details Textual) - USD ($)	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	May. 11, 2015	Feb. 06, 2015	Jun. 02, 2011
2015 Increase [Member]
Stock Repurchase Program, Authorized Amount			$ 2,000,000	$ 1,000,000
Stock Repurchase Program, Authorized Amount			$ 5,000,000	$ 3,000,000	$ 2,000,000
Treasury Stock, Shares, Acquired	52,603	157,539
Treasury Stock Acquired, Average Cost Per Share	$ 6.26	$ 5.57
Treasury Stock, Value, Acquired, Cost Method	$ 329,000	$ 878,000