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Capital And Financial Risk Management (Tables)
 12 Months Ended
Dec. 31, 2020
Capital And Financial Risk Management [Abstract]  
Disclosure of credit risk Financial instruments that potentially subject the Group to concentrations of credit risk consist principally of cash and cash equivalents, investments held at fair value and trade and other receivables. The Group held the following balances:
2020
$000s
2019
$000s
As of December 31
Cash and cash equivalents403,881 132,360 
Short-term investments— 30,088 
Trade and other receivables2,558 1,977 
Total406,438 164,425 
Information about credit quality of neither past due nor impaired financial assets
The aging of trade and other receivables that were not impaired at December 31 is as follows:
As of December 31
2020
$000s
2019
$000s
Neither past due or impaired2,558 1,977 
Total2,558 1,977 
Disclosure of liquidity risk The table below summarizes the maturity profile of the Group’s financial liabilities, including subsidiary preferred shares that have customary liquidation preferences, as of December 31, 2020 and 2019 based on contractual undiscounted payments:
As of December 312020
Carrying Amount
$000s
Within Three Months
$000s
Three to Twelve Months
$000s
One to Five Years
$000s
Total
$000s
Long-term loan14,818 296 905 18,780 19,981 
Subsidiary notes payable26,455 1,455 25,000 — 26,455 
Trade and other payables21,826 21,826 — — 21,826 
Warrants2
8,206 8,206 — — 8,206 
Subsidiary preferred shares (Note 15)1
118,972 118,972 — — 118,972 
Total190,278 150,756 25,905 18,780 195,441 
As of December 312019
Carrying Amount
$000s
Within Three Months
$000s
Three to Twelve Months
$000s
One to Five Years
$000s
Total
$000s
Subsidiary notes payable1,455 1,455 — — 1,455 
Trade and other payables19,842 19,842 — — 19,842 
Warrants2
7,997 7,997 — — 7,997 
Subsidiary preferred shares (Note 15)1
100,989 100,989 — — 100,989 
Total130,283 130,283 — — 130,283 
1    Redeemable only upon a liquidation or Deemed liquidation event, as defined in the applicable shareholder documents.
2    Warrants issued by subsidiaries to third parties to purchase preferred shares.