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Equity - Changes in Shareholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Balance as of beginning of period | $ 216,583 | $ 222,169 | $ 195,431 | $ 200,805 | $ 179,733 | $ 194,842 | $ 195,431 | $ 194,842
Balance as of beginning of period, shares |  |  | 38,192,441 |  |  |  | 38,192,441 |
Balance as of beginning of period, shares |  |  | (6,323,892) |  |  |  | (6,323,892) |
Exercise of common stock options | 140 | 5,728 | $ 4,205 | 302 | 1,251 | 3,848 |  |
Issuance for employee stock purchase plan | 471 |  | 356 | 291 |  | 169 |  |
Vesting of RSUs and PSUs |  | 1 | 1 |  |  | 1 |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs | (142) | (5,875) |  | (172) | (220) |  |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs |  |  | (12,874) |  |  | (7,736) |  |
Share repurchases from ASR agreement |  | (35,000) |  | (40,000) |  |  |  |
Forward contract on ASR agreement |  |  |  | (10,000) |  |  |  |
Stock-based compensation | 7,317 | 10,012 | 7,475 | 7,027 | 7,072 | 6,035 |  |
Other comprehensive loss, net of tax | 575 | (58) | (138) | (14) | (38) |  |  |
Net income | 9,335 | 19,606 | 27,713 | 20,634 | 13,007 | (17,426) | $ 56,654 | 16,215
Balance as of end of period | $ 234,279 | 216,583 | 222,169 | 178,873 | 200,805 | 179,733 | $ 234,279 | 178,873
Balance as of end of period, shares | 39,616,456 |  |  |  |  |  | 39,616,456 |
Balance as of end of period, shares | (7,386,440) |  |  |  |  |  | (7,386,440) |
Common stock |  |  |  |  |  |  |  |
Balance as of beginning of period | $ 40 | $ 39 | $ 38 | $ 38 | $ 38 | $ 37 | $ 38 | $ 37
Balance as of beginning of period, shares | 39,532,358 | 39,029,639 | 38,192,441 | 37,953,398 | 37,816,843 | 37,084,759 | 38,192,441 | 37,084,759
Exercise of common stock options |  | $ 1 |  |  |  |  |  |
Exercise of common stock options, shares | 9,079 | 282,248 | 200,200 | 21,185 | 72,405 | 234,132 |  |
Issuance for employee stock purchase plan, shares | 17,126 |  | 18,538 | 15,176 |  | 11,329 |  |
Vesting of RSUs and PSUs |  | $ 1 | $ 1 |  |  | $ 1 |  |
Vesting of RSUs and PSUs, shares | 61,930 | 392,140 | 1,000,357 | 18,207 | 73,805 | 775,904 |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs |  | $ (1) |  |  |  |  |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs, shares | (4,037) | (171,669) |  | (7,359) | (9,655) |  |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs, shares |  |  | (381,897) |  |  | (289,281) |  |
Balance as of end of period | $ 40 | $ 40 | $ 39 | $ 38 | $ 38 | $ 38 | $ 40 | $ 38
Balance as of end of period, shares | 39,616,456 | 39,532,358 | 39,029,639 | 38,000,607 | 37,953,398 | 37,816,843 | 39,616,456 | 38,000,607
Additional Paid-In Capital |  |  |  |  |  |  |  |
Balance as of beginning of period | $ 567,976 | $ 565,111 | $ 565,949 | $ 548,492 | $ 540,389 | $ 538,073 | $ 565,949 | $ 538,073
Exercise of common stock options | 140 | 5,727 | 4,205 | 302 | 1,251 | 3,848 |  |
Issuance for employee stock purchase plan | 471 |  | 356 | 291 |  | 169 |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs | (142) | (5,874) |  | (172) | (220) |  |  |
Shares withheld for employee taxes upon vesting of RSUs and PSUs |  |  | (12,874) |  |  | (7,736) |  |
Share repurchases from ASR agreement | 7,000 | (7,000) |  |  |  |  |  |
Forward contract on ASR agreement |  |  |  | (10,000) |  |  |  |
Stock-based compensation | 7,317 | 10,012 | 7,475 | 7,027 | 7,072 | 6,035 |  |
Balance as of end of period | 582,762 | 567,976 | 565,111 | 545,940 | 548,492 | 540,389 | 582,762 | 545,940
Treasury Stock |  |  |  |  |  |  |  |
Balance as of beginning of period | $ (165,381) | $ (137,381) | $ (137,381) | $ (61,924) | $ (61,924) | $ (61,924) | $ (137,381) | $ (61,924)
Balance as of beginning of period, shares | (7,212,781) | (6,323,892) | (6,323,892) | (3,235,823) | (3,235,823) | (3,235,823) | (6,323,892) | (3,235,823)
Share repurchases from ASR agreement | $ (7,000) | $ (28,000) |  | $ (40,000) |  |  |  |
Share repurchases from ASR agreement (in shares) | (173,659) | (888,889) |  | (1,702,852) |  |  |  |
Balance as of end of period | $ (172,381) | $ (165,381) | $ (137,381) | $ (101,924) | $ (61,924) | $ (61,924) | $ (172,381) | $ (101,924)
Balance as of end of period, shares | (7,386,440) | (7,212,781) | (6,323,892) | (4,938,675) | (3,235,823) | (3,235,823) | (7,386,440) | (4,938,675)
Accumulated Deficit |  |  |  |  |  |  |  |
Balance as of beginning of period | $ (185,870) | $ (205,476) | $ (233,189) | $ (285,763) | $ (298,770) | $ (281,344) | $ (233,189) | $ (281,344)
Net income | 9,335 | 19,606 | 27,713 | 20,634 | 13,007 | (17,426) |  |
Balance as of end of period | (176,535) | (185,870) | (205,476) | (265,129) | (285,763) | $ (298,770) | (176,535) | (265,129)
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |
Balance as of beginning of period | (182) | (124) | 14 | (38) |  |  | 14 |
Other comprehensive loss, net of tax | 575 | (58) | (138) | (14) | (38) |  |  |
Balance as of end of period | $ 393 | $ (182) | $ (124) | $ (52) | $ (38) |  | $ 393 | $ (52)

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