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Summary of Financial Information of Laser Quantum - Income Statement (Details) - Laser Quantum - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule Of Financial Statements Information [Line Items] |  |  |
Revenue | $ 25,599 | $ 23,013 | $ 16,269
Income from operations | 7,362 | 7,434 | 4,720
Net income | $ 6,925 | $ 6,627 | $ 3,745

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