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Stock-Based Compensation Expense (Tables)
6 Months Ended
Jun. 30, 2017
Stock-Based Compensation Expense

Total stock-based compensation expense recognized in the accompanying condensed consolidated statements of operations for the three and six months ended June 30, 2017 and 2016 was as follows (in thousands):

 

     Three Months Ended June 30,      Six Months Ended June 30,  
     2017      2016      2017      2016  

Stock-based compensation

   $ 1,250      $ 1,355      $ 2,516      $ 2,628