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Significant Accounting Policies Description of the Company Narrative (Details) (USD $)
12 Months Ended
Dec. 31, 2013
segment
Description Of Company And Significant Accounting Policies [Line Items]  
Number of reportable segments 2
Initial And Ongoing Capital Requirement [Member] | Minimum [Member]
 
Description Of Company And Significant Accounting Policies [Line Items]  
Initial capital contribution $ 5,000,000
Follow-on financings 5,000,000
Initial And Ongoing Capital Requirement [Member] | Maximum [Member]
 
Description Of Company And Significant Accounting Policies [Line Items]  
Initial capital contribution 15,000,000
Follow-on financings 10,000,000
Anticipated contribution to partner companies $ 25,000,000