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Restricted Stock Awards (Tables)
3 Months Ended
Mar. 31, 2019
Restricted stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Compensation Expense
Stock-based compensation expense related to restricted stock awards is allocated as follows (in thousands):
 
 
Three Months Ended
 
 
March 31,
 
 
2019
 
2018
General and administrative
 
2

 
10

 
 
$
2

 
$
10