Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Preferred shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred shares, authorized (in shares)	10,000	10,000
Preferred shares, issued (in shares)	0	0
Preferred shares, outstanding (in shares)	0	0
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, authorized (in shares)	100,000	100,000
Common shares, issued (in shares)	24,213	24,213
Treasury shares (in shares)	11,385	11,153