Goodwill and Intangible Assets - Carrying Amounts by Major Classes of Assets and Liabilities (Detail) (Mexican subsidiary [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Mexican subsidiary [Member]
Current assets:
Cash and cash equivalents	$ 1,288
Accounts receivable, less allowance for doubtful accounts	9,355
Inventories	14,757
Other current assets	261
Total current assets	25,661
Property, plant and equipment, at cost
Fixtures and equipment	589
Capitalized software costs	109
Total property, plant and equipment	698
Less: accumulated depreciation and amortization	576
Net property, plant equipment	122
Goodwill	4,621
Other assets	658
Total assets	31,062
Current liabilities:
Accounts payable	5,242
Accrued liabilities	1,651
Total current liabilities	6,893
Other long-term liabilities	7
Total liabilities	$ 6,900