Geographic Information - Schedule of Sales by Geographical Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	$ 12,126	$ 10,945	$ 21,536	$ 25,462
Central America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	4,345	1,474	7,980	4,772
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	794	3,188	2,413	6,365
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	4,459	2,138	6,241	5,933
U.S.-based Latin American Distributors [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	2,175	2,571	3,745	5,833
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	$ 353	$ 1,574	$ 1,157	$ 2,559