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Inventories - Summary of Inventories (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Inventory, Net [Abstract] |  |
Raw materials | $ 19,450 us-gaap_InventoryRawMaterials | $ 18,848 us-gaap_InventoryRawMaterials
Work in process | 2,548 us-gaap_InventoryWorkInProcess | 2,644 us-gaap_InventoryWorkInProcess
Finished goods | 2,505 us-gaap_InventoryFinishedGoods | 2,492 us-gaap_InventoryFinishedGoods
Obsolescence allowance | (685)us-gaap_InventoryValuationReserves | (568)us-gaap_InventoryValuationReserves
Inventory, net | $ 23,818 us-gaap_InventoryNet | $ 23,416 us-gaap_InventoryNet

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 Reference 2: 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)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before valuation and LIFO reserves of raw materials 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 Reference 2: 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)(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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