Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]      
Research and development expense $ 3,400,000 $ 7,500,000  
Cash, FDIC insured amount 250,000    
Corporate debt agreements required consolidated adjusted EBITDA $ 0    
Debt agreement original determination date Jun. 30, 2024    
Net cash proceeds received from qualified equity issuances $ 25,000,000    
Cash and cash equivalents 43,701,000   $ 71,663,000
Debt subject to the EBITDA Financial Covenant 292,600,000    
Accrued but unpaid interest $ 2,100,000    
Sales Revenue      
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]      
Number of customers accounted more than 10% of revenue 0 0  
Sales Revenue | Customer Concentration Risk | Lockheed Martin      
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 73.00% 73.00%