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

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Amortized Cost

$ 29,024,083

$ 24,279,231

States and Political Subdivisions General Obligations [Member]

Amortized Cost

633,533

Estimated Fair Value

634,393

States and Political Subdivisions General Obligations [Member] | Us States and Political Subdivisions Debt Securities [Member] | Bellingham Wash [Member]

Amortized Cost

110,988

Estimated Fair Value

$ 109,633

Credit Rating

AA+

States and Political Subdivisions General Obligations [Member] | Us States and Political Subdivisions Debt Securities [Member] | Longview Washington Refunding [Member]

Amortized Cost

$ 163,172

Estimated Fair Value

$ 161,460

Credit Rating

NR

States and Political Subdivisions General Obligations [Member] | Us States and Political Subdivisions Debt Securities [Member] | Memphis Tenn [Member]

Amortized Cost

$ 109,570

Estimated Fair Value

$ 110,302

Credit Rating

AA

States and Political Subdivisions Special Revenue [Member] | Us States and Political Subdivisions Debt Securities [Member] | Philadelphia PA Auth For Indl Dev City Svc Agreementl [Member]

Amortized Cost

$ 149,411

Estimated Fair Value

$ 146,973

Credit Rating

AA

States and Political Subdivisions Special Revenue [Member] | Us States and Political Subdivisions Debt Securities [Member] | Riviera Beach FLA Pub Impt Rev [Member]

Amortized Cost

$ 100,392

Estimated Fair Value

$ 106,025

Credit Rating

AA