Note 6 - Warrants

12 Months Ended

Dec. 31, 2018

Notes to Financial Statements

Warrants [Text Block]

6 . Warrants

The following table summarizes warrant activity for the years ended

December 

31,

2018

and

2017:

	Year Ended					Year Ended
(In thousands, except exercise price)	December 31, 2018					December 31, 201 7
				Wtd. Avg.					Wtd. Avg.
				Exercise					Exercise
	Shares			Price		Shares			Price
Outstanding at beginning of year		6,689		$	4.50		7,603		$	4.46
Exercised		(2,609	)		4.75		(914	)		4.18
Outstanding and exercisable at end of year		4,080		$	4.35		6,689		$	4.50

The outstanding warrants have expiration dates between

March 2021

and

May 2021.