Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Allowance for loan and lease losses	$ 1,908	$ 1,800
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	19,000,000	19,000,000
Common stock, issued (in shares)	6,612,500	6,612,500
Common stock, outstanding (in shares)	6,612,500	6,612,500
Unallocated common stock of Employee Stock Ownership Plan, shares (in shares)	249,783	256,263