Quarterly report pursuant to Section 13 or 15(d)

Restructuring Charges - Additional Information (Details)

v3.8.0.1
Restructuring Charges - Additional Information (Details) - Employee
3 Months Ended
Dec. 19, 2016
Mar. 31, 2018
2016 Restructuring [Member]    
Restructuring Cost And Reserve [Line Items]    
Number of employees terminated 57  
2017 Restructuring [Member]    
Restructuring Cost And Reserve [Line Items]    
Number of employees terminated   5