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Note 2 - Investments - Gross Unrealized Losses (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Available-for-sale securities, less than 12 months, fair value $ 2,434,540 $ 18,056,770
Available-for-sale securities, less than 12 months, unrealized loss (51,973) (1,270,655)
Available-for-sale securities, greater than 12 months, fair value 20,345,582 11,578,599
Available-for-sale securities, greater than 12 months, unrealized loss (853,941) (1,118,623)
Available-for-sale securities, fair value 22,780,122 29,635,369
Available-for-sale securities, unrealized loss (905,914) (2,389,278)
Fixed Maturities [Member]    
Available-for-sale securities, less than 12 months, fair value 811,628 14,744,242
Available-for-sale securities, less than 12 months, unrealized loss (17,017) (1,042,507)
Available-for-sale securities, greater than 12 months, fair value 11,599,630 4,138,095
Available-for-sale securities, greater than 12 months, unrealized loss (435,692) (206,317)
Available-for-sale securities, fair value 12,411,258 18,882,337
Available-for-sale securities, unrealized loss (452,709) (1,248,824)
Fixed Maturities [Member] | US Treasury Securities [Member]    
Available-for-sale securities, less than 12 months, fair value 251,206
Available-for-sale securities, less than 12 months, unrealized loss (27,325)
Available-for-sale securities, greater than 12 months, fair value 267,814
Available-for-sale securities, greater than 12 months, unrealized loss (12,027)
Available-for-sale securities, fair value 267,814 251,206
Available-for-sale securities, unrealized loss (12,027) (27,325)
Fixed Maturities [Member] | Corporate Debt Securities [Member]    
Available-for-sale securities, less than 12 months, fair value 811,628 11,743,222
Available-for-sale securities, less than 12 months, unrealized loss (17,017) (948,539)
Available-for-sale securities, greater than 12 months, fair value 7,950,659 830,239
Available-for-sale securities, greater than 12 months, unrealized loss (370,982) (99,774)
Available-for-sale securities, fair value 8,762,287 12,573,461
Available-for-sale securities, unrealized loss (387,999) (1,048,313)
Fixed Maturities [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available-for-sale securities, less than 12 months, fair value 2,114,260
Available-for-sale securities, less than 12 months, unrealized loss (51,267)
Available-for-sale securities, greater than 12 months, fair value 844,658 859,305
Available-for-sale securities, greater than 12 months, unrealized loss (13,071) (29,364)
Available-for-sale securities, fair value 844,658 2,973,565
Available-for-sale securities, unrealized loss (13,071) (80,631)
Fixed Maturities [Member] | Redeemable Preferred Stock [Member]    
Available-for-sale securities, less than 12 months, fair value 90,840
Available-for-sale securities, less than 12 months, unrealized loss (8,720)
Available-for-sale securities, greater than 12 months, fair value 99,200
Available-for-sale securities, greater than 12 months, unrealized loss (360)
Available-for-sale securities, fair value 99,200 90,840
Available-for-sale securities, unrealized loss (360) (8,720)
Fixed Maturities [Member] | Collateralized Mortgage Backed Securities [Member]    
Available-for-sale securities, less than 12 months, fair value 544,714
Available-for-sale securities, less than 12 months, unrealized loss (6,656)
Available-for-sale securities, greater than 12 months, fair value 2,437,299 2,448,551
Available-for-sale securities, greater than 12 months, unrealized loss (39,252) (77,179)
Available-for-sale securities, fair value 2,437,299 2,993,265
Available-for-sale securities, unrealized loss (39,252) (83,835)
Equity Securities [Member]    
Available-for-sale securities, less than 12 months, fair value 1,622,912 3,312,528
Available-for-sale securities, less than 12 months, unrealized loss (34,956) (228,148)
Available-for-sale securities, greater than 12 months, fair value 8,745,952 7,440,504
Available-for-sale securities, greater than 12 months, unrealized loss (418,249) (912,306)
Available-for-sale securities, fair value 10,368,864 10,753,032
Available-for-sale securities, unrealized loss $ (453,205) $ (1,140,454)