5) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Common Class A
Shares, Outstanding	1,082,088	1,012,306	1,086,053	577,280
Shares outstanding	$ 4.44	$ 4.49	$ 4.41	$ 5.15
Adjustment for effect of stock dividends	829
Shares Granted	37,500	2,000
Shares Exercised	(42,294)	(968)
Shares Cancelled	0	0
Options Exercisable	985,366	898,472
Options exercisable	$ 4.42	$ 4.36
Available options for future grant	$ 97,218	$ 421,241
Weighted average contractual term of options outstanding	5.57 years	5.89 years
Weighted average contractual term of options exercisable	5.16 years	5.71 years
Aggregated intrinsic value of options outstanding	$ 489,237	$ 704,498
Aggregated intrinsic value of options exercisable	$ 471,642	$ 704,498
Common Class C
Shares, Outstanding	684,132	577,280	594,132	1,011,274
Shares outstanding	$ 5.15	$ 5.15	$ 5.36	$ 4.49
Adjustment for effect of stock dividends	0
Shares Granted	90,000	0
Shares Exercised	0	0
Shares Cancelled	0	0
Options Exercisable	452,381	506,404
Options exercisable	$ 5.39	$ 5.13
Available options for future grant	$ 0	$ 165,638
Weighted average contractual term of options outstanding	5.96 years	3.71 years
Weighted average contractual term of options exercisable	4.70 years	2.87 years
Aggregated intrinsic value of options outstanding	$ 41,150	$ 137,424
Aggregated intrinsic value of options exercisable	$ 0	$ 137,424