Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Marketable Securities (Schedule Of Cost And Fair Value Of Marketable Securities) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis $ 13,258,127 $ 22,905,698
Gross Unrealized Gains 571 122
Gross Unrealized Losses (18,612) (33,769)
Fair value 13,240,086 22,872,051
Commercial Paper [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 2,981,307 1,998,001
Gross Unrealized Gains   62
Gross Unrealized Losses (3,737) (153)
Fair value 2,977,570 1,997,910
Corporate Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 4,036,820 2,042,697
Gross Unrealized Losses (9,300) (6,827)
Fair value 4,027,520 2,035,870
Certificates of Deposit [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost Basis 6,240,000 18,865,000
Gross Unrealized Gains 571 60
Gross Unrealized Losses (5,575) (26,789)
Fair value $ 6,234,996 $ 18,838,271