Financial instruments - fair values and risk management - Contractual maturities of financial liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Carrying amounts	$ 35,777	$ 28,507	$ 18,374
Contractual cash flows	35,869	28,515	18,430
3 months or less
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	34,159	26,886	17,246
Between 3 - 12 months
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	811	453	337
Between 1 - 5 years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	899	1,176	847
Lease liabilities
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Carrying amounts	2,421	1,934	1,111
Contractual cash flows	2,513	1,942	1,167
Lease liabilities \| 3 months or less
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	803	313	32
Lease liabilities \| Between 3 - 12 months
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	811	453	288
Lease liabilities \| Between 1 - 5 years
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	899	1,176	847
Trade and other payables
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Carrying amounts	33,356	26,573	17,214
Contractual cash flows	33,356	26,573	17,214
Trade and other payables \| 3 months or less
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows	$ 33,356	$ 26,573	17,214
Loans from shareholders
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Carrying amounts			49
Contractual cash flows			49
Loans from shareholders \| Between 3 - 12 months
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Contractual cash flows			$ 49

- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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