Note 3 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Share-based Compensation, Stock Options, Activity [Table Text Block]

				Weighted
				Average
				Exercise Price
	Options			Per Option
Options outstanding, December 31, 2017		884,998		$	2.26
Granted to employees and non-employee directors		349,750			3.27
Exercised		(131,834	)		1.70
Canceled/expired/forfeited		-			0.00
Options outstanding, September 30, 2018		1,102,914			2.65
Options exercisable, September 30, 2018		415,169			2.13