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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Balance (in shares) at Dec. 31, 2013   31,195,041      
Balance at Dec. 31, 2013 $ 84,124 $ 312 $ 187,051 $ 1,911 $ (105,150)
Net income 8,170       8,170
Unrealized gain (loss) on investments (28)     (28)  
Foreign currency translation adjustment, net (7,743)     (7,743)  
Share-based compensation expense 1,766   1,766    
Shares issued in acquisition (in shares)   215,285      
Shares issued in acquisition 4,000 $ 2 3,998    
Exercise of stock options and vesting of restricted stock 1,681 $ 7 1,674    
Exercise of stock options and vesting of restricted stock (in shares)   633,348      
Balance (in shares) at Dec. 31, 2014   32,774,374      
Balance at Dec. 31, 2014 111,732 $ 328 198,064 (5,773) (80,887)
Net income 9,345       9,345
Unrealized gain (loss) on investments 22     22  
Foreign currency translation adjustment, net (2,815)     (2,815)  
Share-based compensation expense 3,598   3,598    
Exercise of stock options and vesting of restricted stock 866 $ 1 865    
Exercise of stock options and vesting of restricted stock (in shares)   174,979      
Balance (in shares) at Dec. 31, 2015   32,949,353      
Balance at Dec. 31, 2015 122,748 $ 329 202,527 (8,566) (71,542)
Net income 11,681       11,681
Unrealized gain (loss) on investments 6     6  
Foreign currency translation adjustment, net (5,189)     (5,189)  
Share-based compensation expense 4,595   4,595    
Shares issued in acquisition (in shares)   538,700      
Shares issued in acquisition 14,135 $ 5 14,130    
Payment of contingent consideration in stock 875   875    
Payment of contingent consideration in stock (in shares)   34,803      
Conversion option of convertible notes, net of issuance costs of $639,000 18,072   18,072    
Exercise of stock options and vesting of restricted stock 1,841 $ 4 1,837    
Exercise of stock options and vesting of restricted stock (in shares)   321,218      
Balance (in shares) at Dec. 31, 2016   33,844,074      
Balance at Dec. 31, 2016 $ 168,764 $ 338 $ 242,036 $ (13,749) $ (59,861)