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Secured Investor Certificates (Tables)
6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Maturity Schedule Secured Investor Certificates
     
July 1, 2018 through June 30, 2019 $    4,342,000  
July 1, 2019 through December 31, 2019 1,530,000  
2020 4,167,000  
2021 2,056,000  
2022 897,000  
Thereafter  16,114,000  
     
           Totals $29,106,000