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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
BS Parenthetical [Abstract]    
Allowance for loan losses $ 291 $ 277
Common stock, par value (in USD per share) $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares, issued 51,136,000 50,513,000
Common stock, shares outstanding 51,136,000 50,513,000