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v3.19.1

Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings (Deficit) [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 | $ 231,250 | $ 698 | $ 121,694 | $ 282,370 | $ (173,512)
Beginning Balance, Shares at Dec. 31, 2017 |  | 58,856,860 |  |  | 10,987,362
Net income | 37,110 |  |  | 37,110 |
Employee stock purchase and option plans | 195 | $ 0 | 195 |  |
Employee stock purchase and option plans, Shares |  | 26,832 |  |  |
Shares withheld for taxes on share-based payment awards | (3,782) | $ 0 | (3,782) |  |
Shares withheld for taxes on share-based payment awards, Shares |  | (13,028) |  |  |
Stock-based compensation | 2,296 | $ 1 | 2,295 |  |
Stock-based compensation, Shares |  | 80,988 |  |  |
Shares repurchased under our publicly announced share repurchase programs | (5,210) |  |  |  | $ (5,210)
Shares repurchased under our publicly announced share repurchase programs, Shares |  | (100,044) |  |  | 100,044
Ending Balance at Mar. 31, 2018 | 261,859 | $ 699 | 120,402 | 319,480 | $ (178,722)
Ending Balance, Shares at Mar. 31, 2018 |  | 58,851,608 |  |  | 11,087,406
Beginning Balance at Dec. 31, 2018 | 342,963 | $ 700 | 124,224 | 416,942 | $ (198,903)
Beginning Balance, Shares at Dec. 31, 2018 |  | 58,551,653 |  |  | 11,446,683
Net income | 31,555 |  |  | 31,555 |
Employee stock purchase and option plans | 302 | $ 0 | 302 |  |
Employee stock purchase and option plans, Shares |  | 24,472 |  |  |
Shares withheld for taxes on share-based payment awards | (5,727) | $ 0 | (5,727) |  |
Shares withheld for taxes on share-based payment awards, Shares |  | (74,010) |  |  |
Stock-based compensation | 2,794 | $ 1 | 2,793 |  |
Stock-based compensation, Shares |  | 160,359 |  |  |
Shares repurchased under our publicly announced share repurchase programs | (8,730) |  |  |  | $ (8,730)
Shares repurchased under our publicly announced share repurchase programs, Shares |  | (124,989) |  |  | 124,989
Ending Balance at Mar. 31, 2019 | $ 363,157 | $ 701 | $ 121,592 | $ 448,497 | $ (207,633)
Ending Balance, Shares at Mar. 31, 2019 |  | 58,537,485 |  |  | 11,571,672

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