Note 4 - Fair Value Measurements - Estimated Fair Values of the Company's Financial Assets and Liabilities (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Reported Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	$ 2,077,646	$ 651,809
Investment income due and accrued	286,890	214,998
Investments, at fair value	37,926,317	33,643,190
Total Financial Assets	40,290,853	34,509,997
Financial Liabilities:
Policyholder deposits in deposit-type contracts	16,626,218	13,448,891
Total Financial Liabilities	16,626,218	13,448,891
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	2,077,646	651,809
Investment income due and accrued	286,890	214,998
Investments, at fair value	37,926,317	33,643,190
Total Financial Assets	40,290,853	34,509,997
Financial Liabilities:
Policyholder deposits in deposit-type contracts	15,361,164	12,508,470
Total Financial Liabilities	$ 15,361,164	$ 12,508,470