Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary Of Investments (Details)

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Fair Value Measurements - Summary Of Investments (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 4,745 $ 4,301
Gross unrealized gains in Accumulated OCI 2,675 3,739
Gross unrealized losses in Accumulated OCI (517) 0
Gain/(Loss) in Accumulated Deficit 2,980 4,022
Fair value 9,883 12,062
Common stock investments, available for sale
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,320 3,376
Gross unrealized gains in Accumulated OCI 1,100 2,698
Gross unrealized losses in Accumulated OCI (517) 0
Gain/(Loss) in Accumulated Deficit      
Fair value 3,903 6,074
US Treasury Securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 1,425  
Gross unrealized gains in Accumulated OCI 1,575  
Gross unrealized losses in Accumulated OCI     
Gain/(Loss) in Accumulated Deficit 2,980  
Fair value 5,980  
Common stock options/warrants
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost   925
Gross unrealized gains in Accumulated OCI   1,041
Gross unrealized losses in Accumulated OCI   0
Gain/(Loss) in Accumulated Deficit   4,022
Fair value   $ 5,988