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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2018
[1]
Jul. 01, 2018
Statement Of Financial Position [Abstract]    
Common stock, shares authorized 12,000,000 12,000,000
Common stock, par value $ 0.01 $ 0.01
Common stock, shares issued 7,289,280 7,251,937
Treasury stock, shares 3,616,030 3,616,734
[1] Unaudited