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 ($)
Mar. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis $ 14,006,579 $ 13,258,127
Gross Unrealized Gains 2,365 571
Gross Unrealized Losses (3,771) (18,612)
Fair value 14,005,173 13,240,086
Commercial Paper [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 2,986,944 2,981,307
Gross Unrealized Losses (2,124) (3,737)
Fair value 2,984,820 2,977,570
Corporate Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 5,019,635 4,036,820
Gross Unrealized Gains 138  
Gross Unrealized Losses (843) (9,300)
Fair value 5,018,930 4,027,520
Certificates of Deposit [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 6,000,000 6,240,000
Gross Unrealized Gains 2,227 571
Gross Unrealized Losses (804) (5,575)
Fair value $ 6,001,423 $ 6,234,996