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Stockholders' Equity - Components of Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Beginning Balance $ 159,539 $ 237,054 $ 229,537 $ 240,265
Beginning Balance, Shares     6,282,000  
Issuance of common stock under stock plans, including tax effects 239 195 $ 33 (64)
Repurchases of common stock $ (2,496) $ (4,969) $ (2,496) $ (12,984)
Repurchases of common stock, Shares 200,000 300,000 200,000 700,000
Stock-based compensation expense $ 3,388 $ 3,603 $ 9,509 $ 11,202
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201613Member   us-gaap:AccountingStandardsUpdate201613Member  
Net Income (Loss) $ (2,126) (5,798) $ (85,485) (6,179)
Net change in marketable investments, net of tax 21 107 29 131
Foreign currency translation (893) 4,142 6,545 1,963
Ending Balance $ 157,672 234,334 $ 157,672 234,334
Ending Balance, Shares 6,522,000   6,522,000  
Common Stock [Member]        
Beginning Balance $ 254 $ 249 $ 251 $ 247
Beginning Balance, Shares 25,361,000 24,897,000 25,119,000 24,684,000
Issuance of common stock under stock plans, including tax effects $ 1 $ 2 $ 4 $ 4
Issuance of common stock under stock plans, including tax effects, Shares 150,000 195,000 392,000 408,000
Ending Balance $ 255 $ 251 $ 255 $ 251
Ending Balance, Shares 25,511,000 25,092,000 25,511,000 25,092,000
Additional Paid-in Capital [Member]        
Beginning Balance $ 298,129 $ 285,395 $ 292,217 $ 278,057
Issuance of common stock under stock plans, including tax effects 238 193 29 (68)
Stock-based compensation expense 3,388 3,603 9,509 11,202
Ending Balance 301,755 289,191 301,755 289,191
Retained Earnings [Member]        
Beginning Balance 88,575 177,300 171,934 177,681
Net Income (Loss) (2,126) (5,798) (85,485) (6,179)
Ending Balance 86,449 171,502 86,449 171,502
Treasury Stock [Member]        
Beginning Balance $ (227,119) $ (219,164) $ (227,119) $ (211,149)
Beginning Balance, Shares 6,282,000 5,841,000 6,282,000 5,437,000
Repurchases of common stock $ (2,496) $ (4,969) $ (2,496) $ (12,984)
Repurchases of common stock, Shares 240,000 268,000 240,000 672,000
Ending Balance $ (229,615) $ (224,133) $ (229,615) $ (224,133)
Ending Balance, Shares 6,522,000 6,109,000 6,522,000 6,109,000
Accumulated Other Comprehensive Loss [Member]        
Beginning Balance $ (300) $ (6,726) $ (7,746) $ (4,571)
Net change in marketable investments, net of tax 21 107 29 131
Foreign currency translation (893) 4,142 6,545 1,963
Ending Balance $ (1,172) $ (2,477) $ (1,172) $ (2,477)