Note 1 - Description of Business and Significant Accounting Policies - Deferred Annuity Deposit-Type Contracts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Balance at beginning of period	$ 78,063,888
Receipts on deposit-type contracts	5,984,026	$ 4,383,636
Interest credited	1,910,726	1,778,460
Withdrawals on deposit-type contracts	(8,018,262)	(8,326,217)
Balance at end of period	77,940,378	78,063,888
Deferred Annuity Deposit-type Contracts [Member]
Balance at beginning of period	77,928,817	78,880,542
Receipts on deposit-type contracts	5,956,592	4,373,807
Interest credited	1,907,674	1,775,438
Withdrawals on deposit-type contracts	(7,989,015)	(8,293,629)
Balance at end of period	77,804,068	77,928,817
Deferred Annuity Deposit-type Contracts [Member] | Lewer Companies [Member]
Receipts on deposit-type contracts	$ 0	$ 1,192,659