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Stockholders' Equity - Additional Information (Detail) - USD ($)
9 Months Ended
Jun. 01, 2020
Sep. 30, 2021
Sep. 30, 2020
Aug. 05, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total compensation cost   $ 5,155,000 $ 5,913,000  
Proceeds from exercise of stock options   247,000 2,115,000  
Amount share repurchase program of common shares       $ 25,000,000
Public Offering [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of common stock in connection with public offering, net of commissions and expenses of $6,200, Shares 8,000,000      
Public offering price per share $ 11.00      
Net offering proceeds after deducting underwriting discount and commission and offering expenses $ 95,000,000      
Over-Allotment Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Underwriters option exercisable period 30 days      
Underwriters option to purchase additional shares 1,200,000      
Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total compensation cost   793,000 683,000  
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total compensation cost   $ 2,891,000 3,329,000  
Performance Based Restricted Stock [Member] | Share-based Compensation Award, Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period   1 year    
Performance Based Restricted Stock [Member] | Share-based Compensation Award, Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period   3 years    
Performance Based Restricted Stock Unit [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total compensation cost   $ 1,471,000 $ 1,901,000  
Share Repurchase Program [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares purchased and retired   0 0