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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Profit or loss [abstract] |  |  |
Revenue | $ 53,505 | $ 47,300 | $ 40,760
Cost of sales and services | (10,400) | (7,130) | (5,736)
Gross profit | 43,105 | 40,170 | 35,024
Operating expenses |  |  |
Sales and marketing expenses | (25,725) | (24,544) | (25,287)
General and administrative expenses | (11,582) | (76,219) | (4,936)
Research and development expenses | (11,458) | (10,481) | (9,838)
Total operating expenses | (48,765) | (111,244) | (40,061)
Operating loss | (5,660) | (71,074) | (5,037)
Non-operating income and expenses |  |  |
Interest income | 9,498 | 2,029 | 131
Other income | 33 | 75 | 118
Other gains and losses | 1,675 | (92,474) | (151,638)
Finance costs | (15) | (8) | (9)
Total non-operating income and expenses | 11,191 | (90,378) | (151,398)
Income (loss) before income tax | 5,531 | (161,452) | (156,435)
Income tax expense | (115) | (292) | (417)
Net income (loss) | 5,416 | (161,744) | (156,852)
Components of other comprehensive income (loss) that will not be reclassified to profit or loss |  |  |
Actuarial gains (losses) on defined benefit plans | (4) | 22 | (24)
Credit risk changes in financial instrument - Preferred shares | 0 | (7) | (58)
Total components of other comprehensive income (loss) that will not be reclassified to profit or loss | (4) | 15 | (82)
Components of other comprehensive income (loss) that will be reclassified to profit or loss |  |  |
Exchange differences arising on translation of foreign operations | (116) | (1,097) | 123
Other comprehensive income (loss), net | (120) | (1,082) | 41
Total comprehensive income (loss) | 5,296 | (162,826) | (156,811)
Net income (loss) attributable to: |  |  |
Shareholders of the parent | 5,416 | (161,744) | (156,852)
Total comprehensive income (loss) attributable to: |  |  |
Shareholders of the parent | $ 5,296 | $ (162,826) | $ (156,811)
Earnings (loss) per share (in dollars) |  |  |
Basic earnings (loss) per share of class A and class B ordinary shares (in USD per share) | $ 0.05 | $ (2.37) | $ (2.96)
Diluted earnings (loss) per share of class A and class B ordinary shares (in USD per share) | $ 0.05 | $ (2.37) | $ (2.96)

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