Annual report pursuant to Section 13 and 15(d)

Marketable Securities (Narrative) (Details)

v3.3.1.900
Marketable Securities (Narrative) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Fair value $ 13,240,086 $ 22,872,051
Unrealized losses 18,612 $ 33,769
15 Certificates Of Deposit With Unrealized Losses [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fair value 3,594,425  
Unrealized losses 5,575  
3 Commercial Paper With Unrealized Losses [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fair value 2,977,570  
Unrealized losses 3,737  
3 Corporate Bond Securities With Unrealized Losses [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fair value 3,025,320  
Unrealized losses 7,625  
1 Corporate Bond Securities With Unrealized Losses [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fair value 1,002,200  
Unrealized losses $ 1,675