Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value) (Details)

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Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents $ 5,198,202 $ 5,991,869
Current Liabilities, fair value   (558,801)
Assets (Liabilities) Net, fair value 21,698,970 15,096,360
Level 1 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 5,198,202 5,751,965
Assets (Liabilities) Net, fair value 5,198,202 5,751,965
Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents   239,904
Assets (Liabilities) Net, fair value 16,500,768 9,903,196
Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Current Liabilities, fair value   (558,801)
Assets (Liabilities) Net, fair value   (558,801)
Money Market Funds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 5,198,202 5,751,965
Money Market Funds [Member] | Level 1 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 5,198,202 5,751,965
Certificates Of Deposit [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents   239,904
Certificates Of Deposit [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents   239,904
Accrued Consideration [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Current Liabilities, fair value   (558,801)
Accrued Consideration [Member] | Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Current Liabilities, fair value   (558,801)
Short-Term Investments [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 5,876,551 5,742,314
Short-Term Investments [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 5,876,551 5,742,314
Short-Term Investments [Member] | Certificates Of Deposit [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 2,881,947 2,582,502
Short-Term Investments [Member] | Certificates Of Deposit [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 2,881,947 2,582,502
Short-Term Investments [Member] | Corporate Notes And Bonds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 2,994,604 3,159,812
Short-Term Investments [Member] | Corporate Notes And Bonds [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 2,994,604 3,159,812
Long Term Investments [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 10,624,217 3,920,978
Long Term Investments [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 10,624,217 3,920,978
Long Term Investments [Member] | Certificates Of Deposit [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 3,081,152 1,197,320
Long Term Investments [Member] | Certificates Of Deposit [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 3,081,152 1,197,320
Long Term Investments [Member] | Corporate Notes And Bonds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 7,543,065 2,723,658
Long Term Investments [Member] | Corporate Notes And Bonds [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments $ 7,543,065 $ 2,723,658