Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Purchase and Lease Commitments (Details)

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Commitments and Contingencies - Purchase and Lease Commitments (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Lease Commitments          
Renewal option period     5 years    
Deferred rent $ 0.4   $ 0.4   $ 0.4
Rent expense 0.6 $ 0.5 1.7 $ 1.6  
Inventory          
Commitments and Contingencies          
Commitment to purchase inventories $ 37.4   $ 37.4