Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Share-Based Payment Transactions (Details)

v3.19.1
Share-Based Payment Transactions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]      
General and administrative expenses $ 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