Note 3 - Fair Value Measurements - Estimated Fair Values of the Company's Financial Assets and Liabilities (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Reported Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	$ 3,943,050	$ 2,077,646
Investment income due and accrued	285,653	286,890
Investments, at fair value	41,831,001	37,926,317
Total Financial Assets	46,059,704	40,290,853
Financial Liabilities:
Policyholder deposits in deposit-type contracts	17,993,557	16,626,218
Total Financial Liabilities	17,993,557	16,626,218
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	3,943,050	2,077,646
Investment income due and accrued	285,653	286,890
Investments, at fair value	41,831,001	37,926,317
Total Financial Assets	46,059,704	40,290,853
Financial Liabilities:
Policyholder deposits in deposit-type contracts	17,429,418	15,361,164
Total Financial Liabilities	$ 17,429,418	$ 15,361,164