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Acquisition of Professional Power Products, Inc. - Summary of Supplemental Pro Forma Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] |  |  |
Net sales | $ 67,567 | $ 155,293 | $ 128,699
Net (loss) income | $ (2,343) | $ 6,199 | $ (4,684)
(Loss) earnings per share, basic | $ (0.25) | $ 0.59 | $ (0.51)
(Loss) earnings per share, diluted | $ (0.25) | $ 0.56 | $ (0.51)

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