Note I - Treasury Stock (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Mar. 28, 2017	May 11, 2015	Feb. 06, 2015	Jun. 02, 2011
Stock Repurchase Program, Authorized Amount					$ 7,000,000	$ 5,000,000	$ 3,000,000	$ 2,000,000
Treasury Stock, Shares, Acquired	6,864	7,264	7,538	7,998
Treasury Stock Acquired, Average Cost Per Share	$ 9.66	$ 10.80	$ 9.66	$ 10.79
Treasury Stock, Value, Acquired, Cost Method	$ 66,000	$ 78,000	$ 72,000	$ 86,000
Excluding Restricted Stock Purchased [Member]
Treasury Stock, Shares, Acquired	36,949	0	36,949	0
Treasury Stock Acquired, Average Cost Per Share	$ 9.68		$ 9.68
Treasury Stock, Value, Acquired, Cost Method	$ 358,000		$ 358,000
2015 Increase [Member]
Stock Repurchase Program, Authorized Amount						$ 2,000,000	$ 1,000,000
2017 Increase [Member]
Stock Repurchase Program, Authorized Amount					$ 2,000,000