Revenue (Details) £ in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) $ / lb	Dec. 31, 2021 USD ($) $ / lb	Dec. 31, 2020 USD ($)	Mar. 31, 2023 GBP (£) $ / lb	Mar. 31, 2022 GBP (£) $ / lb
Revenue
Sale of commodities - Copper	$ 62,657	$ 73,780	$ 211,152	$ 260,673	$ 192,008
Sale of by product - Silver	2,570	2,736	8,553	12,707	10,175
Total	65,227	76,516	219,705	273,380	202,183
Impact on revenue recognized due to the changes in pricing of copper for the sales provisionally priced	$ 1,098	$ 2,155	760	2,441	$ (2,364)
Provisionally priced copper sales			$ 29,548	$ 37,012		£ 15,458	£ 25,282
Average price per pound of provisionally priced copper sales \| $ / lb			2.75	4.34		2.97	3.33

No definition available.

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The increase (decrease) in contract assets resulting from cumulative catch-up adjustments to revenue arising from a change in an estimate of the transaction price. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Increase (decrease) through cumulative catch-up adjustments to revenue, contract assets]

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The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

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The amount of revenue arising from the sale of copper. [Refer: Revenue]

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The amount of revenue arising from the sale of silver. [Refer: Revenue]

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The average provisional price per pound of these provisionally priced sales subject to final pricing.

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No definition available.

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Amount of provisionally priced copper sales subject to final pricing over the next several months.

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No definition available.

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