v3.21.1
Accounts payable and accrued liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Accounts payable and accrued liabilities    
Trade accounts payable $ 3,412 $ 4,641
Accrued research and development liabilities 982 152
Other accrued liabilities 654 164
Accrued compensation and benefits payable 516 957
Accounts payable and accrued liabilities $ 5,564 $ 5,914