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Discontinued Operations - Summary of financial results from discontinued operations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Income Statement [Abstract]      
Net income (loss) from discontinued operations:   $ (40,112) $ (23,812)
Impairment of goodwill $ (8,600)    
Discontinued Operations      
Income Statement [Abstract]      
Impairment of goodwill   (8,606) 0
Statement of Financial Position [Abstract]      
Goodwill   0 8,606
Total assets from discontinued operations   10,977 40,687
Total liabilities from discontinued operations   9,391 13,864
Drivetrain | Discontinued Operations      
Income Statement [Abstract]      
Net income (loss) from discontinued operations:   (30,414) (23,829)
Statement of Financial Position [Abstract]      
Total assets from discontinued operations   3,604 22,686
Total liabilities from discontinued operations   5,743 10,228
XL Grid | Discontinued Operations      
Income Statement [Abstract]      
Net income (loss) from discontinued operations:   (1,092) 17
Statement of Financial Position [Abstract]      
Total assets from discontinued operations   7,373 9,395
Total liabilities from discontinued operations   $ 3,648 $ 3,636