CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.006	$ 0.006
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	26,451,237	25,523,216
Common stock, shares outstanding	26,451,237	25,523,216
Series C Convertible Preferred Stock ("Series C Stock")
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000	100,000
Preferred stock, shares issued	1,110	1,200
Preferred stock, shares outstanding	1,110	1,200
Preferred Stock, Liquidation Preference, Value	$ 5,550