Note 4 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

	# of Shares		Wgt Avg Exercise Price		Wgt Avg Remaining Contractual Life in Years		Aggregate Intrinsic Value
Outstanding at September 30, 2017		243,500	$	2.17		5.2	$	405,160
Vested and exercisable at September 30, 2017		206,500	$	1.87		4.5	$	403,880