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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2020
Dec. 31, 2019
Statement Of Financial Position [Abstract]    
Common stock, no par value
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares issued 12,230,000 12,230,000
Common stock, shares outstanding 12,230,000 12,230,000
Treasury Stock, shares 1,071,299 1,093,065