Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Allowance for loan losses	$ 3,893	$ 3,495
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	25,000,000	25,000,000
Common stock, issued (in shares)	6,137,275	6,213,275
Common stock, outstanding (in shares)	6,137,275	6,213,275