Note 4 - Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Investments in available-for-sale securities, at fair value	$ 34,420,862	$ 33,609,215
Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	34,420,862	33,609,215
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value	11,505,918	10,914,265
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value	22,714,944	22,494,950
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value	200,000	200,000
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value		100,520
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value		100,520
Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member]
Investments in available-for-sale securities, at fair value	23,183,390	22,945,700
Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	23,183,390	22,945,700
Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value	268,446	250,750
Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value	22,714,944	22,494,950
Fixed Maturities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value	200,000	200,000
Fixed Maturities [Member] | US Treasury Securities [Member]
Investments in available-for-sale securities, at fair value	268,446	250,750
Fixed Maturities [Member] | US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	268,446	250,750
Fixed Maturities [Member] | US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value	268,446	250,750
Fixed Maturities [Member] | US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | Corporate Debt Securities [Member]
Investments in available-for-sale securities, at fair value	12,709,294	12,156,225
Fixed Maturities [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	12,709,294	12,156,225
Fixed Maturities [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value	12,509,294	11,956,225
Fixed Maturities [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value	200,000	200,000
Fixed Maturities [Member] | US States and Political Subdivisions Debt Securities [Member]
Investments in available-for-sale securities, at fair value	6,207,065	6,352,444
Fixed Maturities [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	6,207,065	6,352,444
Fixed Maturities [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value	6,207,065	6,352,444
Fixed Maturities [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | Redeemable Preferred Stock [Member]
Investments in available-for-sale securities, at fair value	97,760	100,520
Fixed Maturities [Member] | Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	97,760
Fixed Maturities [Member] | Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value	97,760
Fixed Maturities [Member] | Redeemable Preferred Stock [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | Collateralized Mortgage Backed Securities [Member]
Investments in available-for-sale securities, at fair value	3,900,825	4,085,761
Fixed Maturities [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	3,900,825	4,085,761
Fixed Maturities [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value
Fixed Maturities [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value	3,900,825	4,085,761
Fixed Maturities [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value
Equity Securities [Member]
Investments in available-for-sale securities, at fair value	11,237,472	10,663,515
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities, at fair value	11,237,472	10,663,515
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investments in available-for-sale securities, at fair value	11,237,472	10,663,515
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investments in available-for-sale securities, at fair value
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investments in available-for-sale securities, at fair value