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Note K - Stock Option Transactions (Details) - Non-qualified Stock Options [Member]
 12 Months Ended
Jun. 30, 2016
USD ($)
$ / shares
shares
Options outstanding (in shares) 19,200
Options outstanding, weighted average price (in dollars per share) | $ / shares $ 15.96
Options outstanding, aggregate intrinsic value | $
Options Granted (in shares)
Options Canceled/expired (in shares) (1,200)
Canceled/expired, weighted average price (in dollars per share) | $ / shares $ 10.11
Options Exercised (in shares) (1,200)
Exercised, weighted average price (in dollars per share) | $ / shares $ 10.11
Options outstanding (in shares) 16,800
Options outstanding, weighted average price (in dollars per share) | $ / shares $ 16.80
Options outstanding, weighted average remaining contractual life 2 years 233 days
Options outstanding, aggregate intrinsic value | $ $ 2,300