XML 36 R23.htm IDEA: XBRL DOCUMENT v2.4.0.6
Investments (Schedule Of Unrealized Loss On Investments) (Details) (Less Than One Year [Member], USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Less Than One Year [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Aggregate Unrealized Losses $ (1,816,663) $ (2,578,990)
Aggregate Fair Value $ 40,106,822 $ 42,845,635