Segment and Geographic Information - Net Sales by Geographic Location (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location	$ 30,953	$ 23,239	$ 17,671	$ 17,919	$ 28,273	[1]	$ 22,628	$ 15,464	$ 19,568	$ 89,782	$ 85,933	$ 79,956
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										50,732	48,832	51,020
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										13,020	4,491	216
Italy
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										5,623	7,500	6,186
England
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										2,904	3,225	5,420
Spain
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										2,763	2,466	2,637
Other European Countries
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										3,990	2,154	2,588
Pacific and Far East
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										6,366	8,888	2,651
Other International
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										$ 4,384	$ 8,377	$ 9,238

[1] The Company terminated a distributor contract which resulted in sales returns of $1,538 and lowered gross profit by $1,033.