(8) Segment Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Sales, net	$ 9,953		$ 10,400		$ 19,663	$ 21,740
Gross profit	5,595		6,253		11,133	13,018
Research & development	135		255		289	521
Amortization					1,048	1,023
Operating income	3,196		3,438		6,349	7,321
Income before provision for income taxes	3,836		4,211		7,694	9,010
Provision for income taxes	788		758		1,605	1,601
Net income	$ 3,048	$ 3,041	$ 3,453	$ 3,956	6,089	7,409
Single Operating Segment
Sales, net					9,953	10,400
Standard cost of sales					3,763	3,307
Other cost of sales					595	840
Gross profit					$ 5,595	$ 6,253
Gross Profit Margin					56.20%	60.10%
Selling and Marketing Expense					$ 525	$ 546
Research & development					135	254
Litigation Expense					284	637
Amortization					540	509
Other Selling, General and Administrative Expense					915	869
Operating income					$ 3,196	$ 3,438
Operating Income Margin					32.10%	33.10%
Other Interest and Dividend Income					$ 679	$ 858
Other Operating Income (Expense), Net					(40)	(85)
Income before provision for income taxes					3,835	4,211
Provision for income taxes					787	758
Net income					$ 3,048	$ 3,453