Note 4 - Property and Equipment, Net (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Notes Tables

Property, Plant and Equipment [Table Text Block]

	As of
	September 30, 2019		December 31, 2018
Computer equipment and software	$	-	$	211
Furniture, fixtures, and other		-		365
Laboratory equipment		-		514
		-		1,090
Accumulated depreciation		-		(827	)
Property and equipment, net	$	-	$	263

	As of December 31,
	2018			2017
Computer equipment and software	$	211		$	192
Furniture, fixtures, and other		365			302
Laboratory equipment		514			477
		1,090			971
Accumulated depreciation		(827	)		(712	)
Property and equipment, net	$	263		$	259