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Convertible Debt Instruments - Sensitivity (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Exchange rate  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Percentage of reasonably possible increase in input 5.00%
Percentage of reasonably possible decrease in input 5.00%
Discount rate  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Percentage of reasonably possible decrease in input 3.00%
Probability of a qualifying financing event taking place  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Percentage of reasonably possible decrease in input 25.00%
Share price  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Percentage of reasonably possible increase in input 10.00%
Percentage of reasonably possible decrease in input 10.00%
Convertible Debt 1 | Exchange rate  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible increase in input $ (48)
Increase (decrease) in fair value measurement due to reasonably possible decrease in input 48
Convertible Debt 1 | Discount rate  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible decrease in input (24)
Convertible Debt 1 | Probability of a qualifying financing event taking place  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible decrease in input (100)
Convertible Debt 1 | Share price  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible increase in input (10)
Increase (decrease) in fair value measurement due to reasonably possible decrease in input 10
Convertible Debt 2 | Exchange rate  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible increase in input (272)
Increase (decrease) in fair value measurement due to reasonably possible decrease in input 272
Convertible Debt 2 | Discount rate  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible decrease in input (85)
Convertible Debt 2 | Probability of a qualifying financing event taking place  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible decrease in input (40)
Convertible Debt 2 | Share price  
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]  
Increase (decrease) in fair value measurement due to reasonably possible increase in input (39)
Increase (decrease) in fair value measurement due to reasonably possible decrease in input $ 39