Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity:
Blank check preferred stock, par value	$ 0.01	$ 0.01
Blank check preferred stock, authorized shares	5,000,000	5,000,000
Blank check preferred stock, issued shares	0	0
Blank check preferred stock, outstanding shares	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	75,000,000	75,000,000
Common stock, issued shares	29,193,718	28,838,176
Common Stock
Stockholders' Equity:
Common stock, outstanding shares	29,163,673	28,814,142