Note 7 - Stock Plans (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

	RSUs			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2017		98,943		$	4.51
Granted		34,755		$	13.30
Vested		(67,386	)	$	4.56
Forfeited or cancelled		—		$	—
Outstanding at September 30, 2018		66,312		$	9.06