Note 3 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 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 June 30, 2017		244,500	$	2.17		5.5	$	341,000
Vested and exercisable at June 30, 2017		196,500	$	1.76		4.5	$	341,000