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4) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Sep. 30, 2014
Dec. 31, 2013
Class A Common Stock          
Shares, Outstanding 589,801   618,261 503,949 512,795
Shares outstanding $ 3.97   $ 3.89 $ 3.21 $ 3.20
Shares Exercised (28,460)        
Per Share Shares Exercised $ 2.15        
Shares Cancelled   (8,846)      
Per Share Shares cancelled   $ 2.31      
Options Exercisable 484,659     379,946  
Options exercisable $ 3.45     $ 2.75  
Available options for future grant $ 454,842 $ 266,649      
Weighted average contractual term of options outstanding 7.50 years 7.57 years      
Weighted average contractual term of options exercisable 7.03 years 6.91 years      
Aggregated intrinsic value of options outstanding $ 844,342     $ 1,076,880  
Aggregated intrinsic value of options exercisable $ 844,342     $ 988,022  
Class C Common Stock          
Shares, Outstanding 577,436   577,436 577,568 691,591
Shares outstanding $ 3.54   $ 3.54 $ 2.62 $ 2.00
Options Exercisable 498,686     471,943  
Options exercisable $ 2.99     $ 2.15  
Available options for future grant $ 57,750        
Weighted average contractual term of options outstanding 2.50 years 2.93 years      
Weighted average contractual term of options exercisable 2.16 years 2.30 years      
Aggregated intrinsic value of options outstanding $ 1,096,391     $ 1,572,653  
Aggregated intrinsic value of options exercisable $ 1,096,391     $ 1,506,415