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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Tax Credit Carryforward [Line Items]      
Federal Income tax rate 21.00% 21.00%  
Net valuation allowance Increased (decreased) $ 6,400,000 $ 6,400,000 $ (5,100,000)
Research and development tax credit carryforwards for federal and state $ 1,356,000 705,000  
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 $ 46,900,000 14,400,000  
Net operating loss carryforward expiration period 2035    
Federal net operating loss carryforwards, not to expiration $ 46,100,000    
Research and development tax credit carryforwards for federal and state $ 1,900,000 1,000,000.0  
Research and development tax credit carryforwards expiration period 2036    
State and Local Jurisdiction [Member]      
Tax Credit Carryforward [Line Items]      
State net operating loss carryforwards $ 15,000,000.0 6,200,000  
Research and development tax credit carryforwards for federal and state $ 1,100,000 $ 600,000  
Research and development tax credit carryforwards expiration period 2030    
Research and development tax credit carryforwards expiration description As of December 31, 2021 and 2020, the Company has state research and development credit carryforwards or approximately $1.1 million and $0.6 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