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Business acquisitions, Pro Forma Information (Detail) - Rel-Tech Electronics, Inc [Member] | 12 Months Ended
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Oct. 31, 2015 USD ($) $ / shares
Revenue | $ | $ 34,714,000
Net income | $ | $ 958,000
Earnings per share |
Basic | $ / shares | $ 0.11
Diluted | $ / shares | $ 0.11

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