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Fair Value of Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Fair Value Financial Instruments
  June 30, 2018 December 31, 2017
  Carrying Fair Carrying Fair
  Amount Value Amount Value
         
Cash and equivalents $     2,929,684 $     2,929,684 $   502,490 $   502,490
Accounts receivable 255,400 255,400 260,785 260,785
Interest receivable 178,745 178,745 176,365 176,365
Mortgage loans receivable 22,735,396 22,753,220 24,158,787 25,353,731
Bond portfolio 15,294,755      15,294,755 14,687,775 14,687,775
Secured investor certificates 29,106,000 36,761,624 27,323,000 34,811,519