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Note 3 - Investments - Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Investments (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Cost or Amortized Cost $ 40,054,185 $ 33,203,777
Gross Unrealized Gains 204,871 657,628
Gross Unrealized Losses (2,389,278) (252,190)
Investments in available-for-sale securities, at fair value 37,869,778 33,609,215
Fixed Maturities [Member]    
Cost or Amortized Cost 27,957,697 22,439,705
Gross Unrealized Gains 173,366 574,282
Gross Unrealized Losses (1,248,824) (68,287)
Investments in available-for-sale securities, at fair value 26,882,239 22,945,700
Equity Securities [Member]    
Cost or Amortized Cost 12,096,488 10,764,072
Gross Unrealized Gains 31,505 83,346
Gross Unrealized Losses (1,140,454) (183,903)
Investments in available-for-sale securities, at fair value 10,987,539 10,663,515
US Treasury Securities [Member] | Fixed Maturities [Member]    
Cost or Amortized Cost 597,265 271,620
Gross Unrealized Gains
Gross Unrealized Losses (27,325) (20,870)
Investments in available-for-sale securities, at fair value 569,940 250,750
Corporate Debt Securities [Member] | Fixed Maturities [Member]    
Cost or Amortized Cost 16,847,623 11,857,191
Gross Unrealized Gains 43,051 309,754
Gross Unrealized Losses (1,048,313) (10,720)
Investments in available-for-sale securities, at fair value 15,842,361 12,156,225
US States and Political Subdivisions Debt Securities [Member] | Fixed Maturities [Member]    
Cost or Amortized Cost 6,559,854 6,134,323
Gross Unrealized Gains 118,890 230,842
Gross Unrealized Losses (80,631) (12,721)
Investments in available-for-sale securities, at fair value 6,598,113 6,352,444
Redeemable Preferred Stock [Member] | Fixed Maturities [Member]    
Cost or Amortized Cost 99,560 99,560
Gross Unrealized Gains 960
Gross Unrealized Losses (8,720)
Investments in available-for-sale securities, at fair value 90,840 100,520
Collateralized Mortgage Backed Securities [Member] | Fixed Maturities [Member]    
Cost or Amortized Cost 3,853,395 4,077,011
Gross Unrealized Gains 11,425 32,726
Gross Unrealized Losses (83,835) (23,976)
Investments in available-for-sale securities, at fair value $ 3,780,985 $ 4,085,761