Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Securities held-to-maturity, fair value	$ 18,599	$ 33,328
Loans, allowance for loan losses	$ 47,547	$ 47,766	$ 28,546	$ 26,399
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	19,903,342	19,878,713
Common Stock, shares outstanding (in shares)	18,346,288	18,321,659
Treasury stock shares (in shares)	1,557,054	1,557,054	1,498,202