5) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Common Class A
Shares, Outstanding	993,478		1,011,274	838,589	880,426
Shares outstanding	$ 4.50		$ 4.49	$ 4.48	$ 4.35
Shares Granted	2,000	0
Shares Exercised	(19,796)	(36,133)
Shares Cancelled	0	(5,704)
Options Exercisable	955,195			805,902
Options exercisable	$ 4.46			$ 4.46
Available options for future grant	$ 299,351	$ 421,241
Weighted average contractual term of options outstanding	5.40 years	6.05 years
Weighted average contractual term of options exercisable	5.34 years	6.05 years
Aggregated intrinsic value of options outstanding	$ 765,360			$ 867,356
Aggregated intrinsic value of options exercisable	$ 765,360			$ 862,157
Common Class C
Shares, Outstanding	513,466		577,280	523,603	523,603
Shares outstanding	$ 5.33		$ 5.15	$ 5.24	$ 5.24
Shares Granted	0	0
Shares Exercised	(63,814)	0
Shares Cancelled	0	0
Options Exercisable	489,840			505,227
Options exercisable	$ 5.34			$ 5.26
Available options for future grant	$ 146,425	$ 165,638
Weighted average contractual term of options outstanding	3.63 years	2.69 years
Weighted average contractual term of options exercisable	3.37 years	2.45 years
Aggregated intrinsic value of options outstanding	$ 106,646			$ 267,943
Aggregated intrinsic value of options exercisable	$ 106,646			$ 260,592