Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Property and equipment, accumulated depreciation	$ 2,740,422	$ 2,513,022
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000	100,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	112,500,000	112,500,000
Common stock, shares issued (in shares)	5,914,560	2,230,452
Common stock, shares outstanding (in shares)	5,914,226	2,230,118
Treasury stock, shares (in shares)	334	334