Note 10 - Segment Financial Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Division I
Segment Reporting Information, Revenue for Reportable Segment		$ 9,519,000	$ 9,430,000	$ 19,226,000		$ 19,640,000
Profit (Loss)		3,892,000	2,908,000	7,482,000		6,161,000
Segment Reporting Information, Net Assets		105,128,000		105,128,000
Segment Reporting Information, Net Assets				106,982,000
Division II
Segment Reporting Information, Revenue for Reportable Segment		9,628,000	8,789,000	19,130,000		17,970,000
Profit (Loss)		4,970,000	3,506,000	9,811,000		7,260,000
Segment Reporting Information, Net Assets		113,817,000		113,817,000
Segment Reporting Information, Net Assets				112,168,000
Division III
Segment Reporting Information, Revenue for Reportable Segment		10,247,000	9,542,000	20,491,000		19,705,000
Profit (Loss)		5,388,000	3,846,000	10,527,000		8,029,000
Segment Reporting Information, Net Assets		116,518,000		116,518,000
Segment Reporting Information, Net Assets				117,199,000
Division IV
Segment Reporting Information, Revenue for Reportable Segment		10,709,000	9,186,000	21,184,000		18,977,000
Profit (Loss)		5,289,000	2,650,000	9,807,000		5,843,000
Segment Reporting Information, Net Assets		137,893,000		137,893,000
Segment Reporting Information, Net Assets				136,558
Division V
Segment Reporting Information, Revenue for Reportable Segment		7,279,000	6,276,000	14,502,000		12,837,000
Profit (Loss)		3,040,000	1,740,000	6,011,000		3,737,000
Segment Reporting Information, Net Assets		81,597,000		81,597,000
Segment Reporting Information, Net Assets				77,143,000
Division VII
Segment Reporting Information, Revenue for Reportable Segment		7,021,000	5,987,000	13,718,000		12,291,000
Profit (Loss)		2,754,000	1,450,000	4,751,000		2,746,000
Segment Reporting Information, Net Assets		83,791,000		83,791,000
Segment Reporting Information, Net Assets				82,332,000
Division VIII
Segment Reporting Information, Revenue for Reportable Segment		5,973,000	5,198,000	11,950,000		10,914,000
Profit (Loss)		1,225,000	1,107,000	2,869,000		2,510,000
Segment Reporting Information, Net Assets		81,091,000		81,091,000
Segment Reporting Information, Net Assets				69,344,000
Division IX
Segment Reporting Information, Revenue for Reportable Segment		8,612,000	7,701,000	17,140,000		16,207,000
Profit (Loss)		4,055,000	2,192,000	7,562,000		5,175,000
Segment Reporting Information, Net Assets		102,802,000		102,802,000
Segment Reporting Information, Net Assets				103,048,000
Segment Reporting Information, Revenue for Reportable Segment		68,988,000	62,109,000	137,341,000		128,541,000
Profit (Loss)		30,613,000	19,399,000	58,820,000		$ 41,461,000
Segment Reporting Information, Net Assets		822,637,000		822,637,000
Segment Reporting Information, Net Assets				804,774,000
Reconciliation of Revenues
Total revenues from reportable divisions		68,988,000	62,109,000	137,341,000	$ 128,541,000
Corporate finance charges earned not allocated to divisions		23,000	21,000	45,000	52,000
Corporate investment income earned not allocated to divisions		1,695,000	1,669,000	3,738,000	3,449,000
Timing difference of insurance income allocation to divisions		2,098,000	1,531,000	4,944,000	3,830,000
Other revenue not allocated to divisions		4,000	3,000	6,000	5,000
Consolidated Revenues	[1]	72,808,000	65,333,000	146,074,000	135,877,000
Profit per division		30,613,000	19,399,000	58,820,000	41,461,000
Corporate earnings not allocated		3,820,000	3,224,000	8,733,000	7,336,000
Corporate expenses not allocated		(22,701,000)	(17,055,000)	(43,813,000)	(40,394,000)
Consolidated Income Before Income Taxes		$ 11,732,000	$ 5,568,000	$ 23,740,000	$ 8,403,000

[1] Includes Finance Charge Income, Investment Income, Insurance Premium Revenues and Other Revenue.