Note I - Treasury Stock (Details Textual) - USD ($)				9 Months Ended
	Mar. 28, 2017	May 11, 2015	Feb. 06, 2015	Mar. 31, 2017	Mar. 31, 2016	Jun. 02, 2011
Stock Repurchase Program, Authorized Amount	$ 7,000,000	$ 5,000,000	$ 3,000,000			$ 2,000,000
Stock Repurchase Program, Increase in Authorized Amount	$ 2,000,000	$ 2,000,000	$ 1,000,000
Treasury Stock, Shares, Acquired				39,547	52,603
Treasury Stock Acquired, Average Cost Per Share				$ 8.74	$ 6.26
Treasury Stock, Value, Acquired, Cost Method				$ 345,000	$ 329,000
Restricted Stock [Member]
Shares Paid for Tax Withholding for Share Based Compensation				38,729	27,196
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures				7,000	2,667