Note 3 - Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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		289,750			3.20
Exercised		(50,000	)		1.53
Canceled/expired/forfeited		-			0.00
Options outstanding, March 31, 2018		1,124,748			2.53
Options exercisable, March 31, 2018		313,334			2.02