Inventory (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 13,678us-gaap_InventoryRawMaterials	$ 12,229us-gaap_InventoryRawMaterials
Work-in-process	128us-gaap_InventoryWorkInProcess	111us-gaap_InventoryWorkInProcess
Finished goods	10,416us-gaap_InventoryFinishedGoods	7,337us-gaap_InventoryFinishedGoods
Reserve for excess and obsolete inventory	(1,596)us-gaap_InventoryValuationReserves	(1,354)us-gaap_InventoryValuationReserves
Total inventory	$ 22,626us-gaap_InventoryNet	$ 18,323us-gaap_InventoryNet

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

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-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 35

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.6(a))

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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