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Disclosure of detailed informaton about redeemable preference share with determinable redemption date (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Statements [Line Items]  
Accretion income $ 300
Redeemable Preference Share With Determinable Redemption Date [Member]  
Statements [Line Items]  
Balance, December 31, 2017 0
Initial recognition of preferred shares at fair value 19,231
Accretion income 253
Balance, December 31, 2018 $ 19,484