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Inventory
 9 Months Ended
Sep. 30, 2025
Inventory Disclosure [Abstract]  
Inventory Inventory
The following table summarizes the components of our inventory, net of allowance for obsolescence, as of the dates presented:
September 30, December 31,
20252024
Raw materials, net of allowance of $1,499 and $4,379, respectively
$20,425 $17,706 
Work-in-process1,083 345 
Inventory - current21,508 18,051 
Raw materials - long term, net of allowance of $1,020 and $1,488, respectively
— — 
Total inventory$21,508 $18,051 
Our long-term inventory, which is fully reserved for obsolescence, consists of raw materials that remain viable but with limited market opportunities.
The following table summarizes the changes in our allowance for obsolescence for the periods presented:
September 30, December 31,
20252024
Beginning balance$5,867 $4,004 
Allowance for obsolescence61 1,863 
Write-offs(3,409)— 
Ending balance$2,519 $5,867 
The substantial write-off of the allowance for obsolescence during the nine months ended September 30, 2025 reflects the disposal of inventory items, including engines, frames and coolers, among other items that were previously held and reserved at our former Midland, Texas fabrication facility.