Summary of Financial Information of Laser Quantum - Balance Sheet (Details) - Laser Quantum - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Schedule Of Financial Statements Information [Line Items]
Total assets	[1]	$ 30,159	$ 25,423
Total liabilities		$ 2,552	$ 2,482

[1] Total assets at December 31, 2015 and 2014 included cash and cash equivalent of $21.0 million and $17.1 million, respectively.