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8. Note Payable to Bank (Tables)
 6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Summary of notes payable to bank
    June 30,     December 31,  
    2018     2017  
Promissory note payable to First Security Bank of Missoula,            
bearing interest at 3.150%, payable on demand, collateralized            
by a lien on Certificate of Deposit   $ 99,999     $ 98,863  
                 
Promissory note payable to First Security Bank of Missoula,                
bearing interest at 3.150%, payable on demand, collateralized                
by a lien on Certificate of Deposit     91,010       93,702  
Total notes payable to the bank   $ 191,009     $ 192,565