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Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands | Total | Adjustment to opening retained earnings due to adoption of ASU 2020-06 | Class A voting common stock | Class B voting common stock | Common stock Class A voting common stock | Common stock Class B voting common stock | Additional paid-in capital | Additional paid-in capital Adjustment to opening retained earnings due to adoption of ASU 2020-06 | Accumulated other comprehensive income (loss) | Accumulated deficit | Accumulated deficit Adjustment to opening retained earnings due to adoption of ASU 2020-06
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2020 |  |  |  |  | 22,413,004 | 2,496,125 |  |  |  |  |
Beginning balance at Dec. 31, 2020 | $ 429,923 |  |  |  | $ 22 | $ 2 | $ 451,463 |  | $ 27,941 | $ (49,505) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Issuance of debt conversion option | 66,908 |  |  |  |  |  | 66,908 |  |  |  |
Debt conversion option issuance costs, net of tax | (2,019) |  |  |  |  |  | (2,019) |  |  |  |
Capped call option purchase price | (25,500) |  |  |  |  |  | (25,500) |  |  |  |
Exercises of vested stock options (in shares) |  |  |  |  | 73,985 |  |  |  |  |  |
Exercises of vested stock options | 923 |  |  |  |  |  | 923 |  |  |  |
Vesting of restricted stock units (in shares) |  |  |  |  | 186,502 |  |  |  |  |  |
Equity awards withheld for tax liability (in shares) |  |  |  |  | (26,458) |  |  |  |  |  |
Equity awards withheld for tax liability | (3,835) |  |  |  |  |  | (3,835) |  |  |  |
Conversion of Class B voting common stock to Class A voting common stock (in shares) |  |  |  |  | 530,955 | (530,955) |  |  |  |  |
Conversion of Class B voting common stock to Class A voting common stock | 1 |  |  |  | $ 1 | $ 0 |  |  |  |  |
Foreign currency translation | (41,150) |  |  |  |  |  |  |  | (41,150) |  |
Unrealized gain/loss on employee benefit pension plan | 169 |  |  |  |  |  |  |  | 169 |  |
Stock-based compensation | 14,537 |  |  |  |  |  | 14,537 |  |  |  |
Net income (loss) | (27,362) |  |  |  |  |  |  |  |  | (27,362) |
Ending balance (in shares) at Dec. 31, 2021 |  |  |  |  | 23,177,988 | 1,965,170 |  |  |  |  |
Ending balance at Dec. 31, 2021 | $ 412,595 |  |  |  | $ 23 | $ 2 | 502,477 |  | (13,040) | (76,867) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Accounting Standards Update | Accounting Standards Update 2020-06 |  |  |  |  |  |  |  |  |  |
Exercises of vested stock options (in shares) |  |  |  |  | 20,468 |  |  |  |  |  |
Exercises of vested stock options | $ 163 |  |  |  |  |  | 163 |  |  |  |
Vesting of restricted stock units (in shares) |  |  |  |  | 231,234 |  |  |  |  |  |
Equity awards withheld for tax liability (in shares) |  |  |  |  | (50,690) |  |  |  |  |  |
Equity awards withheld for tax liability | (2,134) |  |  |  |  |  | (2,134) |  |  |  |
Unrealized loss on marketable securities | 314 |  |  |  |  |  |  |  | 314 |  |
Foreign currency translation | (31,855) |  |  |  |  |  |  |  | (31,855) |  |
Unrealized gain/loss on employee benefit pension plan | 367 |  |  |  |  |  |  |  | 367 |  |
Stock-based compensation | 20,655 |  |  |  |  |  | 20,655 |  |  |  |
Net income (loss) | 19,570 |  |  |  |  |  |  |  |  | 19,570 |
Ending balance (in shares) at Dec. 31, 2022 |  |  | 23,379,000 | 1,965,170 | 23,379,000 | 1,965,170 |  |  |  |  |
Ending balance at Dec. 31, 2022 | $ 272,177 | $ (147,498) |  |  | $ 23 | $ 2 | 364,913 | $ (156,248) | (44,214) | (48,547) | $ 8,750
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Exercises of vested stock options (in shares) | 61,349 |  |  |  | 61,349 |  |  |  |  |  |
Exercises of vested stock options | $ 414 |  |  |  |  |  | 414 |  |  |  |
Vesting of restricted stock units (in shares) |  |  |  |  | 804,962 |  |  |  |  |  |
Vesting of restricted stock units | 1 |  |  |  | $ 1 |  |  |  |  |  |
Equity awards withheld for tax liability (in shares) |  |  |  |  | (46,313) |  |  |  |  |  |
Equity awards withheld for tax liability | (941) |  |  |  |  |  | (941) |  |  |  |
Conversion of Class B voting common stock to Class A voting common stock (in shares) |  |  |  |  | 7,142 | (7,142) |  |  |  |  |
Conversion of Class B voting common stock to Class A voting common stock | 0 |  |  |  |  |  |  |  |  |  |
Unrealized loss on marketable securities | (248) |  |  |  |  |  |  |  | (248) |  |
Foreign currency translation | 15,698 |  |  |  |  |  |  |  | 15,698 |  |
Unrealized gain/loss on employee benefit pension plan | (30) |  |  |  |  |  |  |  | (30) |  |
Stock-based compensation | 26,662 |  |  |  |  |  | 26,662 |  |  |  |
Net income (loss) | (16,343) |  |  |  |  |  |  |  |  | (16,343) |
Ending balance (in shares) at Dec. 31, 2023 |  |  | 24,206,140 | 1,958,028 | 24,206,140 | 1,958,028 |  |  |  |  |
Ending balance at Dec. 31, 2023 | $ 297,390 |  |  |  | $ 24 | $ 2 | $ 391,048 |  | $ (28,794) | $ (64,890) |

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