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5) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($)
 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Jun. 30, 2017
Dec. 31, 2016
Common Class A          
Shares, Outstanding 838,589   880,426 741,973 741,973
Shares outstanding $ 4.48   $ 4.35 $ 4.33 $ 4.33
Shares Granted 0 0      
Shares Exercised (36,133) 0      
Shares Cancelled (5,704) 0      
Options Exercisable 805,902     706,854  
Options exercisable $ 4.46     $ 4.21  
Available options for future grant $ 421,241 $ 525,682      
Weighted average contractual term of options outstanding 6.05 years 6.62 years      
Weighted average contractual term of options exercisable 6.05 years 6.50 years      
Aggregated intrinsic value of options outstanding $ 867,356     $ 941,567  
Aggregated intrinsic value of options exercisable $ 862,157     $ 941,311  
Common Class C          
Shares, Outstanding 523,603   523,603 428,669 556,298
Shares outstanding $ 5.24   $ 5.24 $ 5.59 $ 4.61
Shares Granted 0 0      
Shares Exercised 0 (103,402)      
Shares Cancelled 0 (24,227)      
Options Exercisable 505,227     407,669  
Options exercisable $ 5.26     $ 5.50  
Available options for future grant $ 165,638 $ 227,750      
Weighted average contractual term of options outstanding 2.69 years 2.63 years      
Weighted average contractual term of options exercisable 2.45 years 2.55 years      
Aggregated intrinsic value of options outstanding $ 267,943     $ 151,012  
Aggregated intrinsic value of options exercisable $ 260,592     $ 151,012