Note I - Treasury Stock (Details Textual) - USD ($)	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	May 11, 2015	Feb. 06, 2015	Jun. 02, 2011
Stock Repurchase Program, Authorized Amount			$ 5,000,000	$ 3,000,000	$ 2,000,000
Treasury Stock, Shares, Acquired	0	35,703
Treasury Stock Acquired, Average Cost Per Share		$ 5.91
Treasury Stock, Value, Acquired, Cost Method		$ 212,000
2015 Increase [Member]
Stock Repurchase Program, Authorized Amount			$ 2,000,000	$ 1,000,000