Share based compensation - Activity SOP 2020 (Details) - SOP 2020	12 Months Ended
Dec. 31, 2021 Options $ / shares shares	Dec. 31, 2020 Options $ / shares
Number of awards
Unvested awards outstanding at beginning of period (shares) \| Options	2,405,833
Forfeited during the period (shares) \| Options	(145,000)
Unvested awards outstanding at end of period (shares) \| Options	2,260,833	2,405,833
Weighted average remaining life (years)
Weighted average remaining life for unvested awards outstanding	1 year 4 months 24 days	2 years 4 months 24 days
Weighted average exercise price
Weighted average exercise price, unvested awards outstanding (per share) \| $ / shares	$ 1.84	$ 1.84
Weighted average fair value
Unvested awards, fair value at beginning of period (per share) \| $ / shares	1.72
Unvested awards, fair value at end of period (per share) \| $ / shares	$ 2.08	$ 1.72
Number of potential additional grants \| shares	1,708,907

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The number of share options outstanding in a share-based payment arrangement.

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The number of share options forfeited in a share-based payment arrangement.

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The weighted average exercise price of share options outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

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Weighted average fair value of unvested awards at balance sheet date.

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The number of additional options that may be granted if certain profitability conditions are fulfilled.

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