Quarterly report pursuant to Section 13 or 15(d)

Note 13 - Share-based Compensation - Share-based Compensation Expense (Details)

v3.19.2
Note 13 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Total share-based compensation $ 182 $ 292 $ 312 $ 445
Research and Development Expense [Member]        
Total share-based compensation 67 81 125 103
General and Administrative Expense [Member]        
Total share-based compensation $ 115 $ 211 $ 187 $ 342