Note 4 - Stock-based Compensation; Changes in Equity (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Share-based Payment Arrangement, Activity [Table Text Block]

	Shares under Option		Weighted Average Exercise Price
Balance at December 31, 2018		471,144	$	3.95
Granted		-		-
Cancelled/Expired		-		-
Exercised/Issued		-		-
Outstanding at March 31, 2019		471,144	$	3.95
Exercisable at March 31, 2019		165,264	$	4.05