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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Apr. 01, 2025
Mar. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Net income   $ (3,778) $ (12,753) $ (20,199) $ (34,154)    
Net loss per share, basic (USD per share)   $ (0.07) $ (0.29) $ (0.36) $ (0.81)    
Net loss per share, diluted (USD per share)   $ (0.07) $ (0.29) $ (0.36) $ (0.81)    
Effective income tax rate (in percent)   0.00% 0.00% 0.00% 0.00%    
Change in Accounting Method Accounted for as Change in Estimate              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Depreciation   $ (1,700)   $ (4,100)      
Net income   $ 1,700   $ 4,100      
Change in Accounting Method Accounted for as Change in Estimate | Forecast              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Depreciation $ (1,100)            
Net income $ 1,100            
Data center equipment              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Useful life of property, plant and equipment           6 years  
Machinery and equipment              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Useful life of property, plant and equipment           6 years  
Machinery and equipment | Change in Accounting Method Accounted for as Change in Estimate              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Net loss per share, basic (USD per share)   $ 0.03   $ 0.07      
Net loss per share, diluted (USD per share)   $ 0.03   $ 0.07      
Minimum | Data center equipment              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Useful life of property, plant and equipment             3 years
Minimum | Machinery and equipment              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Useful life of property, plant and equipment             3 years
Maximum | Data center equipment              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Useful life of property, plant and equipment             5 years
Maximum | Machinery and equipment              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Useful life of property, plant and equipment             5 years