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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Ordinary Shares | Additional Paid-in Capital | Treasury Stock | (Accumulated Deficit) | Accumulated Other Comprehensive Income
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2020 |  | $ 77,401 | $ 123 |  | $ 1,266,318 | $ (12,322) | $ (1,240,379) | $ 63,661
Balance (in shares) at Dec. 31, 2020 | [1] |  | 8,974,568 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Share buyback |  |  |  |  |  |  |  |
Share buyback (in shares) |  |  |  |  |  |  |  |
Restricted shares issued and restricted share units released |  | $ 504 |  |  | 504 |  |  |
Restricted shares issued and restricted share units released (in shares) | [1] |  | 53,917 |  |  |  |  |
Net loss |  | (5,828) |  |  |  |  | (5,828) |
Other comprehensive income (loss): |  |  |  |  |  |  |  |
Foreign currency translation |  | (3,720) |  |  |  |  |  | (3,720)
CTA recognition on liquidation of the subsidiaries |  | (6) |  |  |  |  |  | (6)
Balance at Dec. 31, 2021 |  | 68,351 | $ 123 |  | 1,266,822 | (12,322) | (1,246,207) | 59,935
Balance (in shares) at Dec. 31, 2021 | [1] |  | 9,028,485 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Option exercise |  | 20 |  |  | 20 |  |  |
Option exercise (in shares) | [1] |  | 4,430 |  |  |  |  |
Cancellation of restricted shares issued | [1] |  | (4,702) |  |  |  |  |
Share buyback |  | $ (13) |  |  |  | (13) |  |
Share buyback (in shares) |  | (15,699) | (3,925) | [1] |  |  |  |
Restricted shares issued and restricted share units released |  | $ 603 |  |  | 603 |  |  |
Restricted shares issued and restricted share units released (in shares) | [1] |  | 48,795 |  |  |  |  |
Net loss |  | (5,002) |  |  |  |  | (5,002) |
Other comprehensive income (loss): |  |  |  |  |  |  |  |
Foreign currency translation |  | (6,495) |  |  |  |  |  | (6,495)
Balance at Dec. 31, 2022 |  | $ 57,464 | $ 123 |  | 1,267,445 | (12,335) | (1,251,209) | 53,440
Balance (in shares) at Dec. 31, 2022 |  | 9,073,000 | 9,073,083 | [1] |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Option exercise |  | $ 4 |  |  | 4 |  |  |
Option exercise (in shares) | [1] |  | 843 |  |  |  |  |
Share buyback |  |  |  |  |  |  |  |
Share buyback (in shares) |  |  |  |  |  |  |  |
Restricted shares issued and restricted share units released |  | $ 293 |  |  | 293 |  |  |
Restricted shares issued and restricted share units released (in shares) | [1] |  | 39,844 |  |  |  |  |
Net loss |  | (3,851) |  |  |  |  | (3,851) |
Other comprehensive income (loss): |  |  |  |  |  |  |  |
Foreign currency translation |  | (2,527) |  |  |  |  |  | (2,527)
Balance at Dec. 31, 2023 |  | $ 51,383 | $ 123 |  | $ 1,267,742 | $ (12,335) | $ (1,255,060) | $ 50,913
Balance (in shares) at Dec. 31, 2023 |  | 9,114,000 | 9,113,770 | [1] |  |  |  |
[1] | Authorized share capital of the Company was amended by the consolidation of the existing 250,000,000 ordinary shares of US$0.00375 par value each into 62,500,000 ordinary shares of US$0.015 par value each effective from June 28, 2022. The outstanding shares and treasury stock shares for 2021 have been adjusted retroactively to reflect the one-for-four reverse share split.

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