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Income taxes: (Tables) | 6 Months Ended
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Jun. 30, 2025
Income taxes: |
Schedule of the components of (loss) income before income taxes | The components of loss before income taxes consist of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended |  | Three Months Ended |  | Six Months Ended |  | Six Months Ended
​ |  | June 30, 2025 | ​ | June 30, 2024 | ​ | June 30, 2025 | ​ | June 30, 2024
Domestic | ​ | $ | (73,645) | ​ | $ | (37,199) | ​ | $ | (136,219) | ​ | $ | (116,203)
Foreign | ​ | ​ | (880) | ​ | ​ | (2,992) | ​ | ​ | (8,569) | ​ | ​ | (8,422)
Total | ​ | $ | (74,525) | ​ | $ | (40,191) | ​ | $ | (144,788) | ​ | $ | (124,625)

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- Definition Tabular disclosure of income before income tax between domestic and foreign jurisdictions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)(Note 1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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