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Company Operations and Summary of Significant Accounting Policies - Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Customer incentives	$ 4,233us-gaap_PayablesToCustomers	$ 3,068us-gaap_PayablesToCustomers
Accrued research and development costs	990us-gaap_OtherAccruedLiabilitiesCurrent	240us-gaap_OtherAccruedLiabilitiesCurrent
Other	2,820us-gaap_OtherSundryLiabilitiesCurrent	2,303us-gaap_OtherSundryLiabilitiesCurrent
Total other current liabilities	$ 8,043us-gaap_OtherLiabilitiesCurrent	$ 5,611us-gaap_OtherLiabilitiesCurrent

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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