(8) Segment Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Sales, net	$ 9,812	$ 10,005	$ 29,475	$ 31,745
Gross profit	5,604	5,802	16,737	18,820
Research & development	167	172	456	692
Amortization			1,593	1,548
Operating income	2,611	3,343	8,961	10,664
Income before provision for income taxes	3,309	4,179	11,004	13,188
Provision for income taxes	678	616	2,284	2,216
Net income	2,631	3,563	$ 8,720	$ 10,972
Single Operating Segment
Sales, net	9,812	10,005
Standard cost of sales	3,359	3,456
Other cost of sales	849	747
Gross profit	$ 5,604	$ 5,802
Gross Profit Margin	57.10%	58.00%
Selling and Marketing Expense	$ 516	$ 437
Research & development	167	171
Litigation Expense	384	426
Amortization	544	525
Other Selling, General and Administrative Expense	1,382	900
Operating income	$ 2,611	$ 3,343
Operating Income Margin	26.60%	33.40%
Other Interest and Dividend Income	$ 719	$ 872
Other Operating Income (Expense), Net	(21)	(36)
Income before provision for income taxes	3,309	4,179
Provision for income taxes	678	615
Net income	$ 2,631	$ 3,564