Note 1 - Description of Business and Significant Accounting Policies - Deferred Annuity 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
Deferred Annuity Deposit-type Contracts [Member]
Balance at beginning of period	78,880,542	75,410,339
Receipts on deposit-type contracts	4,373,807	5,948,185
Interest credited	1,775,438	1,590,654
Withdrawals on deposit-type contracts	(8,293,629)	(4,068,636)
Balance at end of period	77,928,817	78,880,542
Deferred Annuity Deposit-type Contracts [Member] | Lewer Companies [Member]
Receipts on deposit-type contracts	$ 1,192,659	$ 0