Note 12 - Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

			Weighted-
			Average
			Exercise
(in thousands)	Warrants		Price
Outstanding at December 31, 2018		544	$	1.81
Warrants granted		—	$	—
Warrants exercised		—	$	—
Warrants expired		—	$	—
Outstanding at March 31, 2019		544	$	1.81