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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
Laser Quantum
Schedule Of Financial Statements Information [Line Items]
Total assets	$ 20,990	$ 21,596
Total liabilities	$ 4,240	$ 5,330

The amount of assets reported by an equity method investment of the entity.

The amount of liabilities reported by an equity method investment of the entity.