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Restructuring - Schedule of Charges and Payments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Apr. 04, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]          
Number of positions eliminated, period percent 8.00%        
Restructuring Reserve [Roll Forward]          
Accrued restructuring balance at April 1, 2017       $ 0  
Charges to operations   $ 1 $ 0 1,328 $ 0
Cash payments       (934)  
Accrued restructuring balance at December 31, 2017   $ 394   394  
Severance pay and benefits          
Restructuring Reserve [Roll Forward]          
Charges to operations       $ 1,300  
Former executive officer | Severance pay and benefits          
Restructuring Cost and Reserve [Line Items]          
Period of post employment salary 18 months        
Share multiplier, unpaid cash owed percentage       120.00%  
Restructuring Reserve [Roll Forward]          
Charges to operations       $ 500