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
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Option to purchase (shares) 664,000  
2015 Inducement Award Plan    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Possible future issuance under equity compensation plan (in shares) 128,250  
Option to purchase (shares) 109,000 182,600