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Summary of Financial Information of Laser Quantum - Balance Sheet (Detail) (Laser Quantum, USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Laser Quantum |  |
Schedule Of Financial Statements Information [Line Items] |  |
Total assets | $ 20,990 | $ 21,596
Total liabilities | $ 4,240 | $ 5,330

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