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Significant Accounting Policies (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Customer
Jun. 30, 2012
Jun. 30, 2011
Customer
Significant Accounting Policies (Textual) [Abstract]        
Interest in voting securities under equity method 38.00%   38.00%  
Significant Accounting Policies (Additional Textual) [Abstract]        
Equity method investment at which no losses recorded     $ 0  
Percentage of direct or indirect voting interest owned Greater than 50%   Greater than 50%  
Accounts receivable including unbilled amounts of major customer $ 7,200,000   $ 7,200,000  
Percentage of consolidated revenue represented by customer   more than 10%   more than 10%
Number of customers represents consolidated revenue   0   0
Percentage of consolidated revenue 22.00%   15.00%  
Maximum [Member]
       
Significant Accounting Policies (Textual) [Abstract]        
Interest in voting securities under equity method 50.00%   50.00%  
Minimum [Member]
       
Significant Accounting Policies (Textual) [Abstract]        
Interest in voting securities under equity method 20.00%   20.00%  
MSDSonline [Member]
       
Significant Accounting Policies (Textual) [Abstract]        
Period of operation available for MSDSonline     Two days