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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Dec. 31, 2018
Jun. 30, 2018
Shareholders' equity:    
Common stock,par value $ 0.05 $ 0.05
Common stock, authorized shares 7,000,000 7,000,000
Common stock, issued shares 1,513,914 1,513,914
Common stock, outstanding shares 1,494,112 1,494,112
Stock held in treasury, shares 19,802 19,802