Segment and Enterprise Wide Disclosures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2014 Segment	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2013	Mar. 31, 2014
Segment Reporting Information [Line Items]
Number of business segments	1
Goodwill	$ 35,327	35,327			$ 37,990
United States
Segment Reporting Information [Line Items]
Percentage of total consolidated assets	71.00%	71.00%			74.00%
Europe
Segment Reporting Information [Line Items]
Goodwill	$ 51,800	51,800			$ 35,400
Percentage of total consolidated assets, excluding goodwill	8.00%	8.00%			8.00%
International
Segment Reporting Information [Line Items]
Percentage of total product revenue	10.00%	9.00%	10.00%	8.00%