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Stock-Based Compensation Expense (Tables)
3 Months Ended
Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock Based Compensation Expense Recognized in Accompanying Consolidated Statements of Operations

Total stock-based compensation expense recognized in the accompanying condensed consolidated statements of operations for the three months ended March 31, 2018 and 2017 was as follows (in thousands):

 

 

 

Three Months Ended March 31,

 

 

 

2018

 

 

2017

 

Stock-based compensation

 

$

1,943

 

 

$

1,267