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Stockholders' Equity - Components of Stockholders' Equity (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Beginning Balance | $ 237,054 | $ 231,645 | $ 240,265 | $ 221,656
Issuance of common stock under stock plans, including tax effects | $ 195 | $ 284 | $ (64) | $ 865
Repurchases of common stock, Shares | 300,000 | 100,000 | 700,000 | 100,000
Repurchases of common stock | $ (4,969) | $ (3,262) | $ (12,984) | $ (4,082)
Stock-based compensation expense | $ 3,603 | 4,144 | 11,202 | 11,169
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201613Member |  |  |
Net income (loss) | $ (5,798) | 2,484 | (6,179) | 3,713
Net change in marketable investments, net of tax | 107 | 30 | 131 | 52
Foreign currency translation | 4,142 | (2,435) | 1,963 | (483)
Ending Balance | 234,334 | 232,890 | 234,334 | 232,890
Common Stock [Member] |  |  |  |
Beginning Balance | $ 249 | $ 245 | $ 247 | $ 244
Beginning Balance, Shares | 24,897,000 | 24,512,000 | 24,684,000 | 24,367,000
Issuance of common stock under stock plans, including tax effects | $ 2 | $ 2 | $ 4 | $ 3
Issuance of common stock under,stock plans including tax effects, Shares | 195,000 | 160,000 | 408,000 | 305,000
Ending Balance | $ 251 | $ 247 | $ 251 | $ 247
Ending Balance, Shares | 25,092,000 | 24,672,000 | 25,092,000 | 24,672,000
Additional Paid-in Capital [Member] |  |  |  |
Beginning Balance | $ 285,395 | $ 269,371 | $ 278,057 | $ 261,766
Issuance of common stock under stock plans, including tax effects | 193 | 282 | (68) | 862
Stock-based compensation expense | 3,603 | 4,144 | 11,202 | 11,169
Ending Balance | 289,191 | 273,797 | 289,191 | 273,797
Retained Earnings [Member] |  |  |  |
Beginning Balance | 177,300 | 175,860 | 177,681 | 174,631
Net income (loss) | (5,798) | 2,484 | (6,179) | 3,713
Ending Balance | 171,502 | 178,344 | 171,502 | 178,344
Treasury Stock [Member] |  |  |  |
Beginning Balance | $ (219,164) | $ (207,887) | $ (211,149) | $ (207,067)
Beginning Balance, Shares | 5,841,000 | 5,332,000 | 5,437,000 | 5,305,000
Repurchases of common stock, Shares | 268,000 | 105,000 | 672,000 | 132,000
Repurchases of common stock | $ (4,969) | $ (3,262) | $ (12,984) | $ (4,082)
Ending Balance | $ (224,133) | $ (211,149) | $ (224,133) | $ (211,149)
Ending Balance, Shares | 6,109,000 | 5,437,000 | 6,109,000 | 5,437,000
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Beginning Balance | $ (6,726) | $ (5,944) | $ (4,571) | $ (7,918)
Net change in marketable investments, net of tax | 107 | 30 | 131 | 52
Foreign currency translation | 4,142 | (2,435) | 1,963 | (483)
Ending Balance | $ (2,477) | $ (8,349) | $ (2,477) | $ (8,349)

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