Consolidated Balance Sheets (Parenthetical) $ in Thousands	Sep. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Statement Of Financial Position [Abstract]
Cash and due from banks, reserve requirement | $	$ 0	$ 0
Common stock, par value | $ / shares	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	19,000,000
Common stock, shares issued	6,872,634	6,968,469
Common stock, shares outstanding	6,872,634	6,865,653
Preferred stock, shares authorized	10,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Treasury stock shares, at cost		102,816