v3.19.3
Note 4 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Property and equipment, gross $ 51 $ 51 $ 57
Less accumulated depreciation (45) (41) (44)
Property and equipment, net 6 10 13
Furniture and Fixtures [Member]      
Property and equipment, gross 29 29 29
Office Equipment [Member]      
Property and equipment, gross 2 2 2
Computer Equipment [Member]      
Property and equipment, gross 18 18 24
Laboratory Equipment [Member]      
Property and equipment, gross $ 2 $ 2 $ 2