Note 11 - Common Stock Reserved for Future Issuance (Tables)

9 Months Ended

Sep. 30, 2014

Stockholders' Equity Note [Abstract]

Schedule of Stock Reserved [Table Text Block]

	September 30, 2014		December 31, 2013
Issuances under equity incentive plan		7,413		5,025
Conversion of convertible preferred stock		14,445		14,445
Issuances upon exercise of convertible preferred stock warrants		113		113
Total		21,971		19,583