Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement - Marketable Securities - Schedule of Marketable Securities (Details)

v3.3.1.900
Fair Value Measurement - Marketable Securities - Schedule of Marketable Securities (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 4,017,061 $ 9,266,613
Accrued Income $ 14,274 $ 18,472
Unrealized Gains
Unrealized Losses $ (6,231) $ (20,124)
Fair Value 4,025,104 9,264,961
Fair Value, Inputs, Level 2 [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost 4,017,061 9,266,613
Accrued Income $ 14,274 $ 18,472
Unrealized Gains
Unrealized Losses $ (6,231) $ (20,124)
Fair Value 4,025,104 9,264,961
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 750 $ 1,795
Accrued Income
Unrealized Gains
Unrealized Losses
Fair Value $ 750 $ 1,795
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposits [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost 2,050,000 3,430,000
Accrued Income $ 8,584 $ 10,653
Unrealized Gains
Unrealized Losses $ (135) $ (11,236)
Fair Value 2,058,449 3,429,417
Fair Value, Inputs, Level 2 [Member] | Corporate Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost 1,528,308 1,528,308
Accrued Income $ 4,934 $ 5,037
Unrealized Gains
Unrealized Losses $ (5,918) $ (6,631)
Fair Value 1,527,324 1,526,714
Fair Value, Inputs, Level 2 [Member] | Municipal Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost 438,003 4,008,811
Accrued Income $ 756 $ 2,422
Unrealized Gains
Unrealized Losses $ (178) $ (2,116)
Fair Value $ 438,581 4,009,117
Fair Value, Inputs, Level 2 [Member] | US Agency Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost   297,699
Accrued Income   $ 360
Unrealized Gains  
Unrealized Losses   $ (141)
Fair Value   $ 297,918