12) Capital Stock: Share-based Payment Arrangement, Option, Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Common Class A
Common Stock, Shares, Outstanding	16,107,779	15,304,798
Exercise of stock options	68,970	32,517
Dividends	$ 405,210	$ 767,178
Conversion of Class C to Class A	13,824	3,286
Common Stock, Shares, Outstanding	16,595,783	16,107,779
Common Class C
Common Stock, Shares, Outstanding	2,500,887	2,193,643
Exercise of stock options	130,820	191,443
Dividends	$ 61,720	$ 119,087
Conversion of Class C to Class A	(13,824)	(3,286)
Common Stock, Shares, Outstanding	2,679,603	2,500,887