Note 3 - Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	December 31,
	2016		2015
Convertible debt		757,909		427,108
Common stock warrants		460,721		—
Stock options		2,207,409		1,495,582
Unvested restricted stock awards		9,204		15,341
		3,435,243		1,938,031