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v3.22.0.1

Other current assets (Summary of Assets Held For Sale) (Details) |  | 12 Months Ended
--- | --- | ---
Aug. 13, 2021 USD ($) item | Aug. 13, 2021 CAD ($) item | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Other current assets |  |  |  |
Beginning balance |  |  |  | $ 15,051,000
Reclassified from property, plant and equipment |  |  | $ 17,779,000 | (6,888,000)
Disposal |  |  | (241,000) | $ (8,163,000)
Ending balance | $ 7,067,000 |  | $ 17,538,000 |
Selling price | 170,000,000 | $ 210,000,000 |  |
Selling costs | $ 1,500,000 |  |  |
Lease term | 2 years | 2 years |  |
Option to renew lease | true | true |  |
Number of renewals | item | 2 | 2 |  |
Renewal term | 1 year | 1 year |  |

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- Definition Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 15 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123398962&loc=d3e400-110220 + Details
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