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Revenue Recognition - Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Sep. 30, 2018
Mar. 31, 2018
Product Warranty Liability [Line Items]    
Revenue recognized, percentage 87.00%  
Minimum    
Product Warranty Liability [Line Items]    
Warranty period 1 year  
Maximum    
Product Warranty Liability [Line Items]    
Warranty period 2 years  
Extended service warranty, term 4 years  
Accounting Standards Update 2014-09    
Product Warranty Liability [Line Items]    
Adjustment to retained earnings (less than)   $ 0.1
Accounting Standards Update 2017-05    
Product Warranty Liability [Line Items]    
Adjustment to retained earnings (less than)   $ 0.1