Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Leases (Details)

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Commitments and Contingencies - Leases (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Lease Commitments      
Renewal option period 5 years    
Deferred rent $ 0.2    
Rent expense 2.5 $ 2.4 $ 2.3
Inventory      
Commitments and Contingencies      
Commitment to purchase inventories $ 23.8