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Quarterly Data (Unaudited) - Schedule of Quarterly Financial Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 68,727 us-gaap_SalesRevenueNet | $ 49,796 us-gaap_SalesRevenueNet | $ 44,433 us-gaap_SalesRevenueNet | $ 34,361 us-gaap_SalesRevenueNet | $ 76,106 us-gaap_SalesRevenueNet | $ 63,300 us-gaap_SalesRevenueNet | $ 66,641 us-gaap_SalesRevenueNet | $ 57,170 us-gaap_SalesRevenueNet | $ 263,217 us-gaap_SalesRevenueNet | $ 197,317 us-gaap_SalesRevenueNet | $ 135,052 us-gaap_SalesRevenueNet
Gross profit | 21,520 us-gaap_GrossProfit | 14,554 us-gaap_GrossProfit | 14,297 us-gaap_GrossProfit | 11,184 us-gaap_GrossProfit | 22,587 us-gaap_GrossProfit | 21,058 us-gaap_GrossProfit | 21,449 us-gaap_GrossProfit | 19,729 us-gaap_GrossProfit | 84,823 us-gaap_GrossProfit | 61,555 us-gaap_GrossProfit | 42,443 us-gaap_GrossProfit
Net income (loss) | $ 2,767 us-gaap_NetIncomeLoss | $ (1,461)us-gaap_NetIncomeLoss | $ 3,043 us-gaap_NetIncomeLoss | $ 2,208 us-gaap_NetIncomeLoss | $ 1,860 us-gaap_NetIncomeLoss | $ 3,703 us-gaap_NetIncomeLoss | $ 4,493 us-gaap_NetIncomeLoss | $ 3,021 us-gaap_NetIncomeLoss | $ 13,077 us-gaap_NetIncomeLoss | $ 6,557 us-gaap_NetIncomeLoss | $ 10,850 us-gaap_NetIncomeLoss
Basic earnings per share | $ 0.11 us-gaap_EarningsPerShareBasic | $ (0.07)us-gaap_EarningsPerShareBasic | $ 0.17 us-gaap_EarningsPerShareBasic | $ 0.13 us-gaap_EarningsPerShareBasic | $ 0.07 us-gaap_EarningsPerShareBasic | $ 0.14 us-gaap_EarningsPerShareBasic | $ 0.18 us-gaap_EarningsPerShareBasic | $ 0.12 us-gaap_EarningsPerShareBasic | $ 0.51 us-gaap_EarningsPerShareBasic | $ 0.33 us-gaap_EarningsPerShareBasic | $ 0.73 us-gaap_EarningsPerShareBasic
Diluted earnings per share | $ 0.11 us-gaap_EarningsPerShareDiluted | $ (0.07)us-gaap_EarningsPerShareDiluted | $ 0.17 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted | $ 0.07 us-gaap_EarningsPerShareDiluted | $ 0.14 us-gaap_EarningsPerShareDiluted | $ 0.17 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ 0.32 us-gaap_EarningsPerShareDiluted | $ 0.65 us-gaap_EarningsPerShareDiluted

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