Note 6 - Common Stock (Tables)

9 Months Ended

Sep. 30, 2015

Notes Tables

Common Stock Reserve for Future Issuance [Table Text Block]

	September 30, 2015		December 31, 2014
Stock-based compensation awards		2,440,127		1,807,349
Employee Stock Purchase Plan		299,127		140,500
Total		2,739,254		1,947,849