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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $)
In Thousands, except Share data
Total
Ordinary Shares [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2009 $ 26,915 $ 56 $ 85,675 $ 45 $ (58,861)  
Balance, shares at Dec. 31, 2009   19,977,000        
Shares issued in public offering 16,968 12 16,956      
Shares issued in public offering, shares   4,428,000        
Exercise of warrants 1 1        
Exercise of warrants, shares   336,000        
Employee share-based plans 1,322 2 1,320      
Employee share-based plans, shares 557,407 557,000        
Shares issued under employee share-based plans              
Shares issued under employee share-based plans, shares   77,000        
Amortization of deferred stock based compensation 710   710      
Other comprehensive income 293     293   293
Net income for the year 22,175       22,175 22,175
Total comprehensive income 22,468         22,468
Balance at Dec. 31, 2010 68,384 71 104,661 338 (36,686)  
Balance, shares at Dec. 31, 2010   25,375,000        
Exercise of warrants 1,773 1 1,772      
Exercise of warrants, shares   581,000        
Employee share-based plans 936    936      
Employee share-based plans, shares 436,601 436,000        
Shares issued under employee share-based plans              
Shares issued under employee share-based plans, shares   76,000        
Amortization of deferred stock based compensation 1,435   1,435      
Other comprehensive income (740)     (740)   (740)
Net income for the year 28,118       28,118 28,118
Total comprehensive income 27,378         27,378
Balance at Dec. 31, 2011 99,906 72 108,804 (402) (8,568)  
Balance, shares at Dec. 31, 2011 26,467,542 26,468,000        
Employee share-based plans 259    259      
Employee share-based plans, shares 131,922 132,000        
Shares issued under employee share-based plans              
Shares issued under employee share-based plans, shares   82,000        
Amortization of deferred stock based compensation 1,927   1,927      
Other comprehensive income 851     851   851
Net income for the year 11,828       11,828 11,828
Total comprehensive income 12,679         12,679
Balance at Dec. 31, 2012 $ 114,771 $ 72 $ 110,990 $ 449 $ 3,260  
Balance, shares at Dec. 31, 2012 26,681,876 26,682,000