Note 4 - Inventories (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	September 30,		December 31,
	2019		2018
Raw materials	$	—	$	79
Work in process		45		39
Finished goods		—		23
Total	$	45	$	141

	December 31,
	2018		2017
Raw materials	$	79	$	70
Work in process		39		92
Finished goods		23		29
Total	$	141	$	191