Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - 2015 Inducement Award Plan (Detail)

v3.22.2.2
Stock-based Compensation - 2015 Inducement Award Plan (Detail) - shares
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Apr. 30, 2021
Apr. 29, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Option to purchase (shares) 647,000      
2015 Inducement Award Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Possible future issuance under equity compensation plan (in shares) 124,250      
Option to purchase (shares) 92,000 158,100    
Shares authorized under the plan (in shares)     500,000 90,000