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v3.19.2

3. Investments (Details 1) - USD ($) | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Amortized cost | $ 160,085,628 | $ 155,431,261
Estimated fair value | 164,334,869 | 151,777,516
Less Than One Year [Member] |  |
Amortized cost | 11,167,387 | 6,742,519
Estimated fair value | 11,188,535 | 6,738,014
One To Five Years [Member] |  |
Amortized cost | 47,828,173 | 47,038,838
Estimated fair value | 48,719,017 | 46,640,012
Five To Ten Years [Member] |  |
Amortized cost | 79,000,901 | 76,884,505
Estimated fair value | 82,414,899 | 74,290,076
More Than 10 Years [Member] |  |
Amortized cost | 2,010,447 | 2,974,426
Estimated fair value | 2,001,240 | 2,644,180
Residential mortgage-backed securities [Member] |  |
Amortized cost | 20,078,720 | 21,790,973
Estimated fair value | $ 20,011,178 | $ 21,465,234

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