Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Trade accounts payable	$ 519	$ 2,398
Research and development accruals	1,796	1,433
Professional fee accruals	360	809
Payroll accruals	867	2,314
Restructuring Reserve	19	137
Other accrued liabilities	4	144
Accounts payable and accrued liabilities	$ 3,565	$ 7,235