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Summary Information about Stock Options Outstanding (Detail)
3 Months Ended
Mar. 31, 2022
$ / shares
shares
$4.36 - $7.20  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower limit $ 4.36
Range of Exercise Prices, upper limit $ 7.20
Stock Options Number Outstanding | shares 452,510
Stock Options Outstanding Weighted Average Remaining Contractual Life (Years) 4 years 1 month 13 days
Stock Options Outstanding Weighted Average Exercise Price $ 4.41
Stock Options Number Exercisable | shares 452,510
Stock Options Exercisable Weighted Average Exercise Price $ 4.41
$7.50 - $11.25  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower limit 7.50
Range of Exercise Prices, upper limit $ 11.25
Stock Options Number Outstanding | shares 61,317
Stock Options Outstanding Weighted Average Remaining Contractual Life (Years) 1 year 11 months 23 days
Stock Options Outstanding Weighted Average Exercise Price $ 10.19
Stock Options Number Exercisable | shares 61,317
Stock Options Exercisable Weighted Average Exercise Price $ 10.19
$11.30 - $16.95  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower limit 11.30
Range of Exercise Prices, upper limit $ 16.95
Stock Options Number Outstanding | shares 500
Stock Options Outstanding Weighted Average Remaining Contractual Life (Years) 2 years
Stock Options Outstanding Weighted Average Exercise Price $ 11.30
Stock Options Number Exercisable | shares 500
Stock Options Exercisable Weighted Average Exercise Price $ 11.30
$19.70 - $29.55  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower limit 19.70
Range of Exercise Prices, upper limit $ 29.55
Stock Options Number Outstanding | shares 33
Stock Options Outstanding Weighted Average Remaining Contractual Life (Years) 1 year 4 months 17 days
Stock Options Outstanding Weighted Average Exercise Price $ 19.70
Stock Options Number Exercisable | shares 33
Stock Options Exercisable Weighted Average Exercise Price $ 19.70
$4.36 - $29.55  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower limit 4.36
Range of Exercise Prices, upper limit $ 29.55
Stock Options Number Outstanding | shares 514,360
Stock Options Outstanding Weighted Average Remaining Contractual Life (Years) 3 years 10 months 13 days
Stock Options Outstanding Weighted Average Exercise Price $ 5.11
Stock Options Number Exercisable | shares 514,360
Stock Options Exercisable Weighted Average Exercise Price $ 5.11