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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Restricted cash equivalents included in prepaid expenses and other current assets $ 200,000 $ 200,000 $ 200,000
Restricted cash equivalents 56,000 1,256,000 1,300,000
Revenue 28,536,000 11,284,000  
Government grant award amount 18,100,000    
Government assistance, nonoperating income 800,000    
Grants receivable 0    
Deferred grant 2,738,000   $ 2,738,000
UKRAINE      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue $ 10,000,000.0 $ 4,600,000  
Accounts receivable | Customer concentration risk | Customer Two      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Concentration risk percentage 64.00%   64.00%
Accounts receivable | Customer concentration risk | Customer One      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Concentration risk percentage 64.00%   64.00%
Revenue benchmark | Customer concentration risk | Customer Three      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Concentration risk percentage 49.00% 66.00%  
Level 1 | Money Market Funds      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cash equivalents $ 26,200,000   $ 27,000,000.0