CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Investment securities available-for-sale, amortized cost	$ 29,808	$ 22,731
Investment securities held-to-maturity, fair value	8,384	9,149
Loans:
Held for investment, allowance for loan losses	$ 8,312	$ 7,464
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	60,000,000	60,000,000
Common stock, shares issued (in shares)	8,169,439	8,096,039
Common stock, shares outstanding (in shares)	8,169,439	8,096,039