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Discontinued Operations
 12 Months Ended
Dec. 31, 2023
Discontinued Operations and Disposal Groups [Abstract]  
Discontinued Operations Discontinued Operations
In the fourth quarter of 2022, the Company discontinued the operations of its Drivetrain and XL Grid operations. The following table provides supplemental details of the Company’s discontinued operations contained within the consolidated statements of operations for the years ended December 31, 2023 and 2022:
Years Ended December 31,
(Amounts in thousands)20232022
Net loss from discontinued operations:
XL Grid$— $(1,092)
Drivetrain(4,123)(30,414)
Impairment of goodwill— (8,606)
Total$(4,123)$(40,112)
XL Grid

The following table presents financial results of XL Grid operations:

Years Ended December 31,
(Amounts in thousands)20232022
Revenues$149 $12,279 
Operating expenses:
Cost of revenues - inventory and other direct costs148 8,577 
Selling, general, and administrative expenses743 4,794 
Gain on asset disposal(742)— 
Total operating expenses149 13,371 
Net loss from discontinued operations$— $(1,092)

Drivetrain

The following table presents financial results of Drivetrain operations:

Years Ended December 31,
(Amounts in thousands)20232022
Revenues$42 $2,419 
Operating expenses:
Cost of revenues - inventory and other direct costs106 14,038 
Engineering, research, and development— 9,819 
Selling, general, and administrative expenses— 8,041 
Loss on asset disposal4,071 935 
Other (income)(12)— 
Total operating expenses4,165 32,833 
Net loss from discontinued operations$(4,123)$(30,414)

The following table presents aggregate carrying amounts of assets and liabilities of discontinued operations contained within the consolidated balance sheets:

As of December 31,
(Amounts in thousands)20232022
Assets from discontinued operations:
Drivetrain$32 $3,604 
XL Grid— 7,373 
Total assets from discontinued operations$32 $10,977 
Liabilities from discontinued operations:
Drivetrain$170 $5,743 
XL Grid— 3,648 
Total liabilities from discontinued operations$170 $9,391