SHARE CAPITAL AND SHARE BASED COMPENSATION - Time based RSU's (Details) - Time based restricted stock units - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Share options:
Restricted stock units	0	700
Award vesting period (in years)	3 years
Nonvested, Number of Shares
Non vested RSU's starting balance (in shares)	748
Vested during the year (in shares)	(264)
Forfeited during the year (in shares)	(141)
Non vested RSU's ending balance (in shares)	343	748
Weighted average grant date fair value per share
Non vested RSU's starting balance (in dollars per share)	$ 10.02
Vested during the year (in dollars per share)	10.94
Forfeited during the year (in dollars per share)	9.07
Non vested RSU's ending balance (in dollars per share)	$ 9.71	$ 10.02
Remaining performance period (in years)	1 year 1 month 6 days	2 years

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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