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Commitments and Contingencies and Other Matters (Details 5)
12 Months Ended
Dec. 31, 2012
Accounts Receivable
Credit Concentration Risk
Top Ten Customers
customer
Dec. 31, 2011
Accounts Receivable
Credit Concentration Risk
Top Ten Customers
Dec. 31, 2012
Accounts Receivable
Credit Concentration Risk
LED And Solar
Dec. 31, 2011
Accounts Receivable
Credit Concentration Risk
LED And Solar
Dec. 31, 2012
Accounts Receivable
Credit Concentration Risk
LED And Solar
Customer B
Dec. 31, 2011
Accounts Receivable
Credit Concentration Risk
LED And Solar
Customer C
Dec. 31, 2012
Accounts Receivable
Credit Concentration Risk
Data Storage
Dec. 31, 2011
Accounts Receivable
Credit Concentration Risk
Data Storage
Dec. 31, 2012
Accounts Receivable
Credit Concentration Risk
Data Storage
Customer A
Dec. 31, 2011
Net Sales
Customer Concentration Risk
LED And Solar
Customer C
Dec. 31, 2011
Net Sales
Customer Concentration Risk
LED And Solar
Customer D
Dec. 31, 2010
Net Sales
Customer Concentration Risk
LED And Solar
Customer D
Dec. 31, 2010
Net Sales
Customer Concentration Risk
LED And Solar
Customer E
Dec. 31, 2010
Net Sales
Customer Concentration Risk
LED And Solar
Customer F
Dec. 31, 2012
Net Sales
Customer Concentration Risk
Data Storage
Customer A
Concentration of Credit Risk                              
Number of top customers 10                            
Percentage of total accounts receivable from top customers 77.00% 79.00% 56.00% 58.00%     21.00% 19.00%              
Concentration Risk (as a percent)         16.00% 31.00%     16.00% 11.00% 12.00% 12.00% 17.00% 12.00% 14.00%