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Fair Value Financial Instruments - Fair Value Company's Financial Instruments (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Cash and equivalents $ 269,401 $ 191,987
Fair Value    
Cash and equivalents 191,987 191,987
Accounts receivable 125,539 125,539
Interest receivable 185,190 185,190
Mortgage loans receivable 22,425,177 24,573,176
Bond portfolio 16,055,937 16,055,937
Secured investor certificates 26,850,000 32,389,253
Carrying Amount    
Cash and equivalents 269,401 269,401
Accounts receivable 109,612 109,612
Interest receivable 179,747 179,747
Mortgage loans receivable 18,462,121 23,108,195
Bond portfolio 18,284,135 18,284,135
Secured investor certificates $ 24,158,250 $ 29,896,202