Segment and Geographic Information - Net Sales by Geographic Location (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location	$ 28,273	[1]	$ 22,628	$ 15,464	$ 19,568	$ 21,952	$ 20,170	$ 23,421	$ 14,413	$ 85,933	$ 79,956	$ 84,942
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										48,832	51,020	53,730
Italy
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										7,500	6,186	6,260
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										4,491	216	180
England
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										3,225	5,420	5,231
Other European Countries
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										4,620	5,225	4,497
Pacific and Far East
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										8,888	2,651	4,355
Other International
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales by geographic location										$ 8,377	$ 9,238	$ 10,689

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