Note 1 - Description of Business and Significant Accounting Policies - Information About Deposit-type Contracts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance at beginning of period	$ 79,035,350
Receipts on deposit-type contracts	4,383,636	$ 5,389,262
Interest credited	1,778,460	1,597,392
Withdrawals on deposit-type contracts	(8,326,217)	(3,243,267)
Balance at end of period	78,063,888	79,035,350
Premium Deposit Fund Deposit-type Contracts [Member]
Balance at beginning of period	154,808	157,534
Receipts on deposit-type contracts	9,829	80,687
Interest credited	3,022	6,738
Withdrawals on deposit-type contracts	(32,588)	(90,151)
Balance at end of period	$ 135,071	$ 154,808