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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Tax Credit Carryforward [Line Items]        
Federal Income tax rate 21.00% 21.00%    
Net valuation allowance Increased (decreased) $ 9,100,000 $ 9,100,000 $ 9,400,000  
Research and development tax credit carryforwards for federal and state $ 3,202,000 2,294,000    
Period for which cumulative change in ownership annual use net operating loss and research and development credit carryforwards 3 years      
Accrued interest and penalties associated with uncertain tax positions $ 0 0    
Interest or penalties recorded during the year $ 0 0    
Minimum [Member]        
Tax Credit Carryforward [Line Items]        
Percentage of cumulative change in ownership 50.00%      
Domestic Tax Authority [Member]        
Tax Credit Carryforward [Line Items]        
Federal net operating loss carryforwards $ 68,900,000 56,800,000    
Net operating loss carryforward expiration period 2035      
Federal net operating loss carryforwards, not to expiration $ 68,000,000      
Research and development tax credit carryforwards for federal and state $ 4,000,000 2,400,000    
Research and development tax credit carryforwards expiration period 2036      
State and Local Jurisdiction [Member]        
Tax Credit Carryforward [Line Items]        
State net operating loss carryforwards $ 30,100,000 25,000,000    
Research and development tax credit carryforwards for federal and state $ 1,500,000 1,200,000    
Research and development tax credit carryforwards expiration period 2030      
Research and development tax credit carryforwards expiration description As of December 31, 2023 and 2022, the Company has state research and development credit carryforwards or approximately $1.5 million and $1.2 million, respectively, which will begin expiring in 2030 if not utilized      
Israeli Tax Authority [Member] | Foreign Country [Member]        
Tax Credit Carryforward [Line Items]        
Income tax rate       23.00%
Foreign operating losses carryforwards $ 7,900,000 $ 7,900,000    
California [Member] | State and Local Jurisdiction [Member]        
Tax Credit Carryforward [Line Items]        
Net operating loss carryforward expiration period 2035