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Sale of I/O Technology (Details) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Jul. 31, 2012
Sale of license of a portion of intellectual property pertaining to high-speed serial I/O technology
Mar. 31, 2012
Sale of license of a portion of intellectual property pertaining to high-speed serial I/O technology
Item
Dec. 31, 2012
Sale of license of a portion of intellectual property pertaining to high-speed serial I/O technology
Patent Sale and License          
Purchase agreement amount       $ 4,300,000  
Number of employees of entity's India subsidiary accepted employment in purchaser       15  
Cash received upon execution of the agreement, net of transaction costs       2,200,000  
Holdback amount       1,900,000  
Period over which portion of holdback is reserved       12 months  
Holdback payment received     1,300,000    
Gain on asset sale, net of transaction costs $ 3,291,000 $ 35,611,000     $ 3,300,000