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Investments - Summary of Fixed Maturities with Unrealized Losses (Detail) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
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Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | $ 78,670,054 | $ 286,527,668
Less Than 12 Months, Unrealized Losses | 658,213 | 6,038,617
More Than 12 Months, Fair Value | 100,613,863 | 317,236,307
More Than 12 Months, Unrealized Losses | 992,018 | 11,287,703
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 7,461,245 | 26,342,398
Less Than 12 Months, Unrealized Losses | 45,688 | 165,774
More Than 12 Months, Fair Value | 5,394,735 | 54,900,027
More Than 12 Months, Unrealized Losses | 42,242 | 1,924,204
Obligations of States and Political Subdivisions [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 23,339,340 | 28,321,962
Less Than 12 Months, Unrealized Losses | 293,516 | 477,357
More Than 12 Months, Fair Value | 2,326,813 | 21,559,520
More Than 12 Months, Unrealized Losses | 1,587 | 533,741
Corporate Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 19,362,346 | 149,269,854
Less Than 12 Months, Unrealized Losses | 263,280 | 4,482,870
More Than 12 Months, Fair Value | 18,803,546 | 59,396,885
More Than 12 Months, Unrealized Losses | 250,198 | 2,967,766
Mortgage-Backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 28,507,123 | 82,593,454
Less Than 12 Months, Unrealized Losses | 55,729 | 912,616
More Than 12 Months, Fair Value | 74,088,769 | 181,379,875
More Than 12 Months, Unrealized Losses | $ 697,991 | $ 5,861,992

X
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
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