Segment and Enterprise Wide Disclosures - Additional Information (Detail) $ in Thousands	3 Months Ended
	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014	Mar. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of business segments | Segment	1
Goodwill	$ 32,243		$ 31,534
United States
Segment Reporting Information [Line Items]
Percentage of total consolidated assets	76.00%		77.00%
Europe
Segment Reporting Information [Line Items]
Goodwill	$ 47,300		$ 46,200
International
Segment Reporting Information [Line Items]
Percentage of total consolidated assets, excluding goodwill	11.00%		10.00%
Percentage of total product revenue	8.00%	11.00%