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Consolidated Balance Sheets – (unaudited) (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share)
Common stock, shares authorized (in shares) 20,000,000 20,000,000
Common stock, shares issued (in shares) 16,953,744 16,946,622
Common stock, shares outstanding (in shares) 16,953,744 16,946,622