5) Stock Compensation Plans: Schedule of stock inventive plan changes (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Common Class A
Shares, Outstanding	1,112,218	993,478	1,086,053	577,280
Shares outstanding	$ 4.28	$ 4.50	$ 4.41	$ 5.15
Adjustment for effect of stock dividends	27,968
Shares Granted	77,000	2,000
Shares Exercised	(78,803)	(19,796)
Per Share Shares Exercised		$ 0
Shares Cancelled	0
Options Exercisable	1,053,033	955,195
Options exercisable	$ 4.39	$ 4.46
Available options for future grant	$ 325,372	$ 299,351
Weighted average contractual term of options outstanding	P5Y8M19D	P5Y4M24D
Weighted average contractual term of options exercisable	P5Y6M3D	P5Y4M2D
Aggregated intrinsic value of options outstanding	$ 2,242,693	$ 765,360
Aggregated intrinsic value of options exercisable	$ 2,228,291	$ 765,360
Common Class C
Shares, Outstanding	793,486	513,466	594,132	1,011,274
Shares outstanding	$ 4.88	$ 5.33	$ 5.36	$ 4.49
Adjustment for effect of stock dividends	19,354
Shares Granted	180,000	0
Shares Exercised	0	(63,814)
Per Share Shares Exercised		$ 0
Shares Cancelled	0
Options Exercisable	652,805	489,840
Options exercisable	$ 5.14	$ 5.34
Available options for future grant	$ 266,500	$ 146,425
Weighted average contractual term of options outstanding	P5Y11M8D	P3Y7M17D
Weighted average contractual term of options exercisable	P5Y5M27D	P3Y4M13D
Aggregated intrinsic value of options outstanding	$ 1,115,985	$ 106,646
Aggregated intrinsic value of options exercisable	$ 894,505	$ 106,646