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Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2019 | 26,786,459 |  |  |  |
Balance at Dec. 31, 2019 | $ 27 | $ 268,059 | $ 324,722 | $ (7,018) | $ 585,790
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 23,525 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations | $ 0 | (902) | 0 | 0 | (902)
Stock-based compensation expense | 0 | 3,033 | 0 | 0 | 3,033
Net income | 0 | 0 | 13,984 | 0 | 13,984
Other comprehensive loss |  |  |  |  |
Foreign currency translation adjustment | $ 0 | 0 | 0 | (2,980) | (2,980)
Comprehensive income |  |  |  |  | 11,004
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 23,525 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations | $ 0 | (902) | 0 | 0 | (902)
Stock-based compensation expense | $ 0 | 3,033 | 0 | 0 | 3,033
Repurchases of common stock (in shares) | (161,460) |  |  |  |
Repurchases of common stock | $ 0 | (1,616) | (9,569) | 0 | (11,185)
Net income | 0 | 0 | 13,984 | 0 | 13,984
Foreign currency translation adjustment | $ 0 | 0 | 0 | (2,980) | (2,980)
Balance (in shares) at Dec. 31, 2019 | 26,786,459 |  |  |  |
Balance at Dec. 31, 2019 | $ 27 | 268,059 | 324,722 | (7,018) | 585,790
Balance (in shares) at Mar. 31, 2020 | 26,648,524 |  |  |  |
Balance at Mar. 31, 2020 | $ 27 | 268,574 | 329,137 | (9,998) | 587,740
Balance (in shares) at Dec. 31, 2019 | 26,786,459 |  |  |  |
Balance at Dec. 31, 2019 | $ 27 | 268,059 | 324,722 | (7,018) | 585,790
Net income |  |  |  |  | 41,288
Other comprehensive loss |  |  |  |  |
Comprehensive income |  |  |  |  | 41,782
Net income |  |  |  |  | 41,288
Balance (in shares) at Dec. 31, 2019 | 26,786,459 |  |  |  |
Balance at Dec. 31, 2019 | $ 27 | 268,059 | 324,722 | (7,018) | 585,790
Balance (in shares) at Sep. 30, 2020 | 26,753,545 |  |  |  |
Balance at Sep. 30, 2020 | $ 27 | 278,996 | 353,322 | (6,524) | 625,821
Balance (in shares) at Mar. 31, 2020 | 26,648,524 |  |  |  |
Balance at Mar. 31, 2020 | $ 27 | 268,574 | 329,137 | (9,998) | 587,740
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 96,186 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations | $ 0 | 400 | 0 | 0 | 400
Stock-based compensation expense | 0 | 3,639 | 0 | 0 | 3,639
Net income | 0 | 0 | 12,607 | 0 | 12,607
Other comprehensive loss |  |  |  |  |
Foreign currency translation adjustment |  | 0 | 0 | 364 | 364
Comprehensive income |  |  |  |  | 12,971
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 96,186 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations | $ 0 | 400 | 0 | 0 | 400
Stock-based compensation expense | $ 0 | 3,639 | 0 | 0 | 3,639
Repurchases of common stock (in shares) | (38,154) |  |  |  |
Repurchases of common stock | $ 0 | (382) | (3,119) | 0 | (3,501)
Net income | 0 | 0 | 12,607 | 0 | 12,607
Foreign currency translation adjustment |  | 0 | 0 | 364 | 364
Balance (in shares) at Mar. 31, 2020 | 26,648,524 |  |  |  |
Balance at Mar. 31, 2020 | $ 27 | 268,574 | 329,137 | (9,998) | 587,740
Balance (in shares) at Jun. 30, 2020 | 26,706,556 |  |  |  |
Balance at Jun. 30, 2020 | $ 27 | 272,231 | 338,625 | (9,634) | 601,249
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 46,989 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations | $ 0 | 2,820 | 0 | 0 | 2,820
Stock-based compensation expense | 0 | 3,945 | 0 | 0 | 3,945
Net income | 0 | 0 | 14,697 | 0 | 14,697
Other comprehensive loss |  |  |  |  |
Foreign currency translation adjustment |  | 0 | 0 | 3,110 | 3,110
Comprehensive income |  |  |  |  | 17,807
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 46,989 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations | $ 0 | 2,820 | 0 | 0 | 2,820
Stock-based compensation expense | 0 | 3,945 | 0 | 0 | 3,945
Repurchases of common stock | 0 | 0 | 0 | 0 | 0
Net income | 0 | 0 | 14,697 | 0 | 14,697
Foreign currency translation adjustment |  | 0 | 0 | 3,110 | 3,110
Balance (in shares) at Jun. 30, 2020 | 26,706,556 |  |  |  |
Balance at Jun. 30, 2020 | $ 27 | 272,231 | 338,625 | (9,634) | 601,249
Balance (in shares) at Sep. 30, 2020 | 26,753,545 |  |  |  |
Balance at Sep. 30, 2020 | $ 27 | 278,996 | 353,322 | (6,524) | $ 625,821
Balance (in shares) at Dec. 31, 2020 | 26,776,796 |  |  |  | 26,776,796
Balance at Dec. 31, 2020 | $ 27 | 284,848 | 362,901 | (3,420) | $ 644,356
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 48,955 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations |  | (290) |  |  | (290)
Common shares issued for Hubs acquisition (in shares) | 863,995 |  |  |  |
Common shares issued for Hubs acquisition | $ 1 | 166,708 |  |  | 166,709
Stock-based compensation expense |  | 5,620 |  |  | 5,620
Net income |  |  | 3,712 |  | 3,712
Other comprehensive loss |  |  |  |  |
Foreign currency translation adjustment |  |  |  | (6,842) | (6,842)
Net unrealized gains (losses) on investments in securities |  |  |  | 166 | 166
Comprehensive income |  |  |  |  | (2,964)
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 48,955 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations |  | (290) |  |  | (290)
Stock-based compensation expense |  | 5,620 |  |  | 5,620
Net income |  |  | 3,712 |  | 3,712
Foreign currency translation adjustment |  |  |  | (6,842) | $ (6,842)
Balance (in shares) at Dec. 31, 2020 | 26,776,796 |  |  |  | 26,776,796
Balance at Dec. 31, 2020 | $ 27 | 284,848 | 362,901 | (3,420) | $ 644,356
Balance (in shares) at Mar. 31, 2021 | 27,689,746 |  |  |  |
Balance at Mar. 31, 2021 | $ 28 | 456,886 | 366,613 | (10,096) | $ 813,431
Balance (in shares) at Dec. 31, 2020 | 26,776,796 |  |  |  | 26,776,796
Balance at Dec. 31, 2020 | $ 27 | 284,848 | 362,901 | (3,420) | $ 644,356
Net income |  |  |  |  | 21,462
Other comprehensive loss |  |  |  |  |
Comprehensive income |  |  |  |  | 11,424
Net income |  |  |  |  | $ 21,462
Balance (in shares) at Dec. 31, 2020 | 26,776,796 |  |  |  | 26,776,796
Balance at Dec. 31, 2020 | $ 27 | 284,848 | 362,901 | (3,420) | $ 644,356
Balance (in shares) at Sep. 30, 2021 | 27,603,649 |  |  |  | 27,603,649
Balance at Sep. 30, 2021 | $ 28 | 464,900 | 373,151 | (13,458) | $ 824,621
Balance (in shares) at Mar. 31, 2021 | 27,689,746 |  |  |  |
Balance at Mar. 31, 2021 | $ 28 | 456,886 | 366,613 | (10,096) | 813,431
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 85,317 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations |  | (81) |  |  | (81)
Stock-based compensation expense |  | 4,941 |  |  | 4,941
Net income |  |  | 12,915 |  | 12,915
Other comprehensive loss |  |  |  |  |
Foreign currency translation adjustment |  |  |  | 2,030 | 2,030
Net unrealized gains (losses) on investments in securities |  |  |  | (49) | (49)
Comprehensive income |  |  |  |  | 14,896
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares) | 85,317 |  |  |  |
Common shares issued on exercise of options and other, net of shares withheld for tax obligations |  | (81) |  |  | (81)
Stock-based compensation expense |  | 4,941 |  |  | 4,941
Repurchases of common stock (in shares) | (14,000) |  |  |  |
Repurchases of common stock |  | (149) | (1,061) |  | (1,210)
Net income |  |  | 12,915 |  | 12,915
Foreign currency translation adjustment |  |  |  | 2,030 | 2,030
Balance (in shares) at Mar. 31, 2021 | 27,689,746 |  |  |  |
Balance at Mar. 31, 2021 | $ 28 | 456,886 | 366,613 | (10,096) | 813,431
Balance (in shares) at Jun. 30, 2021 | 27,761,063 |  |  |  |
Balance at Jun. 30, 2021 | $ 28 | 461,597 | 378,467 | (8,115) | 831,977
Stock-based compensation expense |  | 4,978 |  |  | 4,978
Net income |  |  | 4,835 |  | 4,835
Other comprehensive loss |  |  |  |  |
Foreign currency translation adjustment |  |  |  | (5,298) | (5,298)
Net unrealized gains (losses) on investments in securities |  |  |  | (45) | (45)
Comprehensive income |  |  |  |  | (508)
Stock-based compensation expense |  | 4,978 |  |  | 4,978
Repurchases of common stock (in shares) | (157,414) |  |  |  |
Repurchases of common stock |  | (1,675) | (10,151) |  | (11,826)
Net income |  |  | 4,835 |  | 4,835
Foreign currency translation adjustment |  |  |  | (5,298) | (5,298)
Balance (in shares) at Jun. 30, 2021 | 27,761,063 |  |  |  |
Balance at Jun. 30, 2021 | $ 28 | 461,597 | 378,467 | (8,115) | $ 831,977
Balance (in shares) at Sep. 30, 2021 | 27,603,649 |  |  |  | 27,603,649
Balance at Sep. 30, 2021 | $ 28 | $ 464,900 | $ 373,151 | $ (13,458) | $ 824,621

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