Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	25,718,037	23,765,180
Common stock, shares outstanding (in shares)	25,718,037	23,765,180
Series A Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares issued (in shares)	0	71
Preferred stock, shares outstanding (in shares)	0	71
Series B Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares issued (in shares)	1,125	1,650
Preferred stock, shares outstanding (in shares)	1,125	1,650