v3.19.2
Accounts payable and accrued liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Accounts payable and accrued liabilities    
Trade accounts payable $ 3,228 $ 2,603
Accrued research & development liabilities 1,691 1,012
Other accrued liabilities 645 164
Accrued compensation and benefits payable 724 698
Accounts payable and accrued liabilities $ 6,288 $ 4,477