5) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Common Class A
Shares, Outstanding	1,113,349	997,946	1,086,053	577,280
Shares outstanding	$ 4.27	$ 4.50	$ 4.41	$ 5.15
Adjustment for effect of stock dividends	29,099
Shares Granted	77,000	2,000
Shares Exercised	(78,803)	(15,328)
Shares Cancelled	0	0
Options Exercisable	1,013,955	921,895
Options exercisable	$ 4.27	$ 4.42
Available options for future grant	$ 325,372	$ 299,351
Weighted average contractual term of options outstanding	5.97 years	5.65 years
Weighted average contractual term of options exercisable	5.61 years	5.53 years
Aggregated intrinsic value of options outstanding	$ 2,568,502	$ 822,875
Aggregated intrinsic value of options exercisable	$ 2,338,090	$ 822,875
Common Class C
Shares, Outstanding	796,676	577,280	594,132	1,011,274
Shares outstanding	$ 4.87	$ 4.42	$ 5.36	$ 4.49
Adjustment for effect of stock dividends	22,544
Shares Granted	180,000	0
Shares Exercised	0	0
Shares Cancelled	0	0
Options Exercisable	561,440	530,030
Options exercisable	$ 5.11	$ 5.14
Available options for future grant	$ 266,500	$ 146,425
Weighted average contractual term of options outstanding	6.18 years	3.46 years
Weighted average contractual term of options exercisable	5.32 years	2.93 years
Aggregated intrinsic value of options outstanding	$ 1,360,855	$ 218,010
Aggregated intrinsic value of options exercisable	$ 823,712	$ 218,010