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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, 2018 $ 102,166 $ 123 $ 1,264,160 $ (10,899) $ (1,212,790) $ 61,572
Balance (in shares) at Dec. 31, 2018   35,317,742        
Increase (Decrease) in Stockholders' Equity            
Ordinary shares issued upon option exercise 56   56      
Ordinary shares issued upon option exercise (in shares)   25,000        
Restricted shares issued and restricted share units released 1,399   1,399      
Restricted shares issued and restricted share units released (in shares)   510,438        
Repurchase or buyback of ordinary shares $ (1,049)     (1,049)    
Repurchase or buyback of ordinary shares (in shares) (328,856) (328,856)        
Net loss $ (3,913)       (3,913)  
Other comprehensive income (loss):            
Foreign currency translation 529         529
Balance at Dec. 31, 2019 99,188 $ 123 1,265,615 (11,948) (1,216,703) 62,101
Balance (in shares) at Dec. 31, 2019   35,524,324        
Increase (Decrease) in Stockholders' Equity            
Restricted shares issued and restricted share units released 703   703      
Restricted shares issued and restricted share units released (in shares)   573,281        
Repurchase or buyback of ordinary shares $ (374)     (374)    
Repurchase or buyback of ordinary shares (in shares) (199,331) (199,331)        
Net loss $ (23,676)       (23,676)  
Other comprehensive income (loss):            
Foreign currency translation 1,560         1,560
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 35,898,000 35,898,274        
Increase (Decrease) in Stockholders' Equity            
Restricted shares issued and restricted share units released $ 504   504      
Restricted shares issued and restricted share units released (in shares)   215,666        
Repurchase or buyback of ordinary shares          
Repurchase or buyback of ordinary shares (in shares)          
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 36,114,000 36,113,940