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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Total
Balance at Dec. 31, 2012 $ 182 $ 1,309,761 $ (20,421) $ (1,153,301) $ 79,621 $ 814 $ 216,656
Balance (in shares) at Dec. 31, 2012 47,656,092            
Repurchase of ordinary shares $ (31) $ (30,649) (30,680)
Repurchase of ordinary shares (in shares) (8,333,333)            
Restricted stock issued and restricted stock units released 0
Restricted stock issued and restricted stock units released (in shares) 455,095            
Stock-based compensation $ 1,698 1,698
Net loss $ (22,721) $ (9) (22,730)
Elimination of the non-controlling interests a result of disposition on of an investment. $ (805) 805
Other comprehensive income:              
Foreign currency translation $ (6,671) (6,671)
CTA recognition due to closure of the subsidiaries (7,088) $ (7,088)
Unrealized gain from available-for-sale investments            
Balance at Dec. 31, 2013 $ 151 $ 1,280,810 $ (20,421) $ (1,176,022) $ 65,862 $ (0) $ 150,380
Balance (in shares) at Dec. 31, 2013 39,777,854            
Common stock issued upon option exercises $ 8 $ 5,332 5,340
Common stock issued upon option exercises (in shares) 2,000,000            
Repurchase of ordinary shares $ (10,308) (10,308)
Repurchase of ordinary shares (in shares) (4,050,296)            
Restricted stock issued and restricted stock units released 0
Restricted stock issued and restricted stock units released (in shares) 420,518            
Stock-based compensation $ 2,289 2,289
Treasury stock retirement $ (37) $ (30,249) $ 30,286 0
Net loss $ (30,264) (30,264)
Other comprehensive income:              
Foreign currency translation $ (2,902) (2,902)
CTA recognition due to closure of the subsidiaries 121 121
Unrealized gain from available-for-sale investments 673 673
Balance at Dec. 31, 2014 $ 122 $ 1,258,182 $ (443) $ (1,206,286) $ 63,754 $ (0) 115,329
Balance (in shares) at Dec. 31, 2014 38,148,076            
Common stock issued upon option exercises $ 39 39
Common stock issued upon option exercises (in shares) 11,543            
Repurchase of ordinary shares $ (3,695) (3,695)
Repurchase of ordinary shares (in shares) (1,563,302)            
Restricted stock issued and restricted stock units released 0
Restricted stock issued and restricted stock units released (in shares) 138,997            
Stock-based compensation $ 1,546 1,546
Net loss $ (20,657) (20,657)
Other comprehensive income:              
Foreign currency translation $ (1,611) (1,611)
Unrealized gain from available-for-sale investments (673) (673)
Balance at Dec. 31, 2015 $ 122 $ 1,259,767 $ (4,138) $ (1,226,943) $ 61,470 $ (0) $ 90,278
Balance (in shares) at Dec. 31, 2015 36,735,314