XML 68 R53.htm IDEA: XBRL DOCUMENT v3.22.0.1
Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Aug. 31, 2017
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate offering price of common stock       $ 7,781,000
Proceeds from sale of common stock   $ 0 $ 0 $ 7,781,000
Sales Agreement | Cowen and Company, LLC        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of commission on proceeds from gross sales of common stock 3.00%      
Sales Agreement | Cowen and Company, LLC | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate offering price of common stock $ 30,000,000      
ATM Facility        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of common stock (in shares)       2,307,000
Proceeds from sale of common stock       $ 7,781,000