Annual report pursuant to Section 13 and 15(d)

Common Stock - Stock Options - Additional Information (Detail)

v3.24.1
Common Stock - Stock Options - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for options currently outstanding 1,461,980 822,515  
Number of shares granted 639,500    
Weighted average fair value of stock options granted $ 4.4    
Unrecognized compensation expense related to stock options granted $ 3,400,000 $ 3,200,000  
Aggregate intrinsic value of options exercised 0 $ 0 $ 0
Aggregate intrinsic value of the outstanding options 0    
Aggregate intrinsic value of the exercisable outstanding options $ 0    
Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Weighted-average period, restricted stock awards 1 year 8 months 8 days 1 year 8 months 8 days  
Restricted Stock Unit [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted shares reserved for issuance under incentive plan 507,875    
Award vesting period 4 years    
Weighted-average period, restricted stock awards 25 days    
2018 Equity Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for issuance under incentive plan 33,473    
Award expiration period 10 years    
2018 Equity Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2018 Equity Incentive Plan [Member] | Minimum [Member] | Board of Directors [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 1 year    
2018 Equity Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 4 years    
2018 Equity Incentive Plan [Member] | Maximum [Member] | Board of Directors [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2018 Equity Incentive Plan [Member] | Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for issuance under incentive plan 1,722,253    
Common shares reserved for options currently outstanding 1,180,905    
New Employee Inducement Grants [Member] | Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for options currently outstanding 135,000    
Award expiration period 10 years    
Number of shares granted 40,000    
2017 Equity Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award expiration period 10 years    
2017 Equity Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2017 Equity Incentive Plan [Member] | Minimum [Member] | Board of Directors [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 1 year    
2017 Equity Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 4 years    
2017 Equity Incentive Plan [Member] | Maximum [Member] | Board of Directors [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2017 Equity Incentive Plan [Member] | Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for issuance under incentive plan 13,156    
2010 Performance Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award expiration period 10 years    
2010 Performance Incentive Plan [Member] | Minimum [Member] | Employees and Consultants [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2010 Performance Incentive Plan [Member] | Minimum [Member] | Board of Directors [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 1 year    
2010 Performance Incentive Plan [Member] | Maximum [Member] | Employees and Consultants [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 4 years    
2010 Performance Incentive Plan [Member] | Maximum [Member] | Board of Directors [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2010 Performance Incentive Plan [Member] | Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for issuance under incentive plan 169    
2023 Non Employee Director Equity Incentive Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for issuance under incentive plan 167,250    
Award expiration period 10 years    
2023 Non Employee Director Equity Incentive Plan [Member] | Minimum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 1 year    
2023 Non Employee Director Equity Incentive Plan [Member] | Maximum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Award vesting period 3 years    
2023 Non Employee Director Equity Incentive Plan [Member] | Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common shares reserved for issuance under incentive plan 300,000    
Common shares reserved for options currently outstanding 132,750