Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details)

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Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis $ 11,517,572 $ 13,258,127
Gross Unrealized Gains 3,446 571
Gross Unrealized Losses (1,119) (18,612)
Fair value 11,519,899 13,240,086
Commercial Paper [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 2,992,580 2,981,307
Gross Unrealized Gains 954  
Gross Unrealized Losses (604) (3,737)
Fair value 2,992,930 2,977,570
Corporate Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 3,004,992 4,036,820
Gross Unrealized Gains 273  
Gross Unrealized Losses (475) (9,300)
Fair value 3,004,790 4,027,520
Certificates of Deposit [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 5,520,000 6,240,000
Gross Unrealized Gains 2,219 571
Gross Unrealized Losses (40) (5,575)
Fair value $ 5,522,179 $ 6,234,996