Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
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
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	7,500,000	7,500,000
Common stock, issued (in shares)	3,762,933	3,762,933
Common stock, outstanding (in shares)	3,337,552	3,338,603
Treasury stock, shares (in shares)	425,381	424,330