Investments (Schedule of Amortized Cost, Fair Value, Credit Rating) (Details) - USD ($)

9 Months Ended

Sep. 30, 2015

Dec. 31, 2014

Amortized Cost

$ 21,351,582

$ 19,289,551

Us States and Political Subdivisions Debt Securities [Member]

Amortized Cost

513,006

Estimated Fair Value

509,886

States and Political Subdivisions General Obligations [Member] | Us States and Political Subdivisions Debt Securities [Member] | Maricopa County Arizona School District no Thirty One [Member]

Amortized Cost

337,047

Estimated Fair Value

$ 332,623

Credit Rating

AA

States and Political Subdivisions General Obligations [Member] | Us States and Political Subdivisions Debt Securities [Member] | Dolton Illinois [Member]

Amortized Cost

$ 55,277

Estimated Fair Value

$ 55,285

Credit Rating

AA

States and Political Subdivisions Special Revenue [Member] | Us States and Political Subdivisions Debt Securities [Member] | Pennington Cnty SD CTFS Tax [Member]

Amortized Cost

$ 65,824

Estimated Fair Value

$ 65,152

Credit Rating

AA-

States and Political Subdivisions Special Revenue [Member] | Us States and Political Subdivisions Debt Securities [Member] | South Dakota ST Health & RV [Member]

Amortized Cost

$ 54,858

Estimated Fair Value

$ 56,826

Credit Rating

AA-