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Description of business - Additional Information (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2021 | Apr. 28, 2021 | Jan. 13, 2017 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Description Of Business [Line Items] |  |  |  |  |  |
Stock issuance costs |  |  |  | $ 5,948 | $ 1,140 | $ 0
Stock split |  | 8.25-for-1 |  |  |  |
SunEdison Utility Holdings, Inc. [Member] |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |
Payments to acquire assets |  |  | $ 6,000 |  |  |
IPO [Member] |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |
Issuance of common stock (in shares) | 19,840,000 |  |  | 4,455,384 |  |
Proceeds from IPO |  |  |  | $ 241,200 |  |
Purchase cost of shares |  |  |  | $ 54,200 |  |
Stock split |  |  |  | 8.25-for-1 |  |

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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123362884&loc=d3e9212-128498 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123362884&loc=d3e9215-128498 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123385561&loc=d3e9135-128495 + Details
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