MORTGAGE-BACKED SECURITIES - MBS Portfolio (Details) - USD ($) |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
Fair Value | $ 64,390,277 | $ 65,178,231 |
Fixed Rate Mortgages [Member] | ||
Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
Fair Value | 61,372,000 | 64,902,000 |
Interest Only Securities [Member] | ||
Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
Fair Value | 2,999,000 | 251,000 |
Inverse Interest Only [Member] | ||
Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
Fair Value | $ 19,000 | $ 25,000 |