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Capital Stock (Tables)
6 Months Ended
Jun. 30, 2015
Capital Stock Disclosure [Abstract]  
Schedule Of Stock Options And Restricted Stock Units Activity Rollforward [Table Text Block]
Stock OptionsRestricted Stock Units
Weighted
StockAverageRestricted
OptionsExercise Stock UnitsGrant Date
Outstanding PriceOutstandingFair Value
Balance at December 31, 20146,263,112$3.42306,397$4.30
Granted863,0005.51254,6855.56
Exercised(1,710,681)3.04--
Vested (RSUs)--(237,188)-
Cancelled / forfeited(246,055)4.01--
Balance at June 30, 20155,169,376$3.87323,894$5.30
Table Of Assumptions [Table Text Block]
Three Months EndedSix Months Ended
June 30,June 30,
2015201420152014
Volatility39.35%57.16%41.08%56.83%
Risk-free interest rate1.70%1.80%1.72%1.78%
Expected holding period (in years)5.28years5.79years5.52years5.75years
Dividend yield-%-%-%-%
Stock Based Compensation Expense Activity By Function [Table Text Block]
Three Months EndedSix Months Ended
June 30,June 30,
2015201420152014
(in thousands)
Cost of revenues$15$30$36$58
Sales and marketing10774194144
General and administrative548356997697
Research and development22124520
Total stock-based compensation$692$472$1,272$919
Basic and Diluted Shares [Table Text Block]
Three Months EndedSix Months Ended
June 30,June 30,
2015201420152014
Basic 33,569,18032,045,31433,240,46731,946,654
Effect of assumed conversion of employee and director stock options and restricted stock units1,456,470900,618-988,801
Diluted35,025,65032,945,93233,240,46732,935,455