Note 3 - Fair Value Measurements - Estimated Fair Values of the Company's Financial Assets and Liabilities (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Reported Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	$ 2,485,374	$ 2,077,646
Investment income due and accrued	311,398	286,890
Investments, at fair value	40,624,649	37,926,317
Total Financial Assets	43,421,421	40,290,853
Financial Liabilities:
Policyholder deposits in deposit-type contracts	17,280,482	16,626,218
Total Financial Liabilities	17,280,482	16,626,218
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	2,485,374	2,077,646
Investment income due and accrued	311,398	286,890
Investments, at fair value	40,624,649	37,926,317
Total Financial Assets	43,421,421	40,290,853
Financial Liabilities:
Policyholder deposits in deposit-type contracts	16,197,221	15,361,164
Total Financial Liabilities	$ 16,197,221	$ 15,361,164