Registration statement for securities of certain foreign private issuers

Share-Based Payment Transactions (Details)

v3.19.3.a.u2
Share-Based Payment Transactions (Details) - USD ($)
$ in Thousands
 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]              
General and administrative expenses $ (1,333) $ (1,819) $ (2,220) $ (2,386) $ 3,159 $ 2,868 $ 2,733
Share-based payment arrangements [Member]              
Statement Line Items [Line Items]              
Research and development expenses         123 139 129
General and administrative expenses         130 53 180
Share-based payments         $ 253 $ 192 $ 309