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Long-term debt (Tables) | 12 Months Ended
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Dec. 31, 2022
Long-term debt |
Schedule of interest expense | ​
​ | ​ | ​ | ​
Years |  | Amount
​ | ​ | (in millions)
2022 | ​ | $ | 11.5
2021 | ​ |  | 7.2
2020 | ​ | ​ | 3.7
Schedule of aggregate maturities of the loan | ​
​ | ​ | ​ | ​
Years |  | Amount
​ | ​ | (in thousands)
2023 | ​ | $ | 14,870
2024 | ​ | ​ | 12,403
2025 | ​ | ​ | 117,219
Total | ​ | $ | 144,492

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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601 + Details
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