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Balance Sheet Information (Details 3) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Property, plant and equipment, net    
Transfers from property, plant and equipment $ 2,700,000 $ 2,700,000
Transfers to assets held for sale 2,700,000 2,700,000
Asset impairment 2,864,000 2,864,000
Goodwill    
Balance at the beginning of the period   91,348,000
Purchase price adjustment (See Business Combinations)   173,000
Balance at the end of the period 91,521,000 91,521,000
Land | LED And Solar
    
Property, plant and equipment, net    
Asset impairment 800,000 800,000
Machinery and equipment | Asia
    
Property, plant and equipment, net    
Asset impairment 1,600,000 1,600,000
Building and improvements | LED And Solar
    
Property, plant and equipment, net    
Asset impairment 400,000 400,000
Property, Plant and Equipment
    
Property, plant and equipment, net    
Asset impairment 2,400,000 2,400,000
Reduction in property, plant and equipment 5,100,000 5,100,000
Property, Plant and Equipment | Machinery and equipment | Tools
    
Property, plant and equipment, net    
Assets held for sale 2,900,000 2,900,000
Assets converted and sold   4,600,000
Aggregate selling price   $ 7,000,000