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Valuation Qualtitative Information (Details) - Level 3 [Member] - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Non-Agency RMBS [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets, Fair Value Disclosure $ 11,834,000 $ 7,259,000
Non-Agency RMBS [Member] | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Yield 5.30% 2.20%
Projected Collateral Prepayments 25.10% 35.70%
Projected Collateral Losses 0.00% 0.00%
Projected Collateral Recoveries 1.60% 1.10%
Non-Agency RMBS [Member] | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Yield 21.60% 31.80%
Projected Collateral Prepayments 56.90% 79.10%
Projected Collateral Losses 8.70% 9.20%
Projected Collateral Recoveries 15.40% 14.00%
Non-Agency RMBS [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Yield 9.40% 6.00%
Projected Collateral Prepayments 31.10% 49.20%
Projected Collateral Losses 5.70% 5.90%
Projected Collateral Recoveries 11.10% 9.30%
Non-Agency RMBS [Member] | Discounted Cash Flows [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets, Fair Value Disclosure $ 1,707,000 $ 4,616,000
Non-Agency RMBS [Member] | Market Quotes [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets, Fair Value Disclosure $ 10,127,000 $ 2,643,000
Non-Agency RMBS [Member] | Market Quotes [Member] | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Non-Binding Third-Party Valuation 0.75 52.43
Non-Agency RMBS [Member] | Market Quotes [Member] | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Non-Binding Third-Party Valuation 81.42 92.28
Non-Agency RMBS [Member] | Market Quotes [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Non-Binding Third-Party Valuation 34.63 88.18
Interest-Only [Member] | Agency RMBS [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets, Fair Value Disclosure $ 4,085,000 $ 5,654,000
Interest-Only [Member] | Agency RMBS [Member] | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Projected Collateral Prepayments 21.20% 17.30%
Interest-Only [Member] | Agency RMBS [Member] | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Projected Collateral Prepayments 76.60% 85.40%
Interest-Only [Member] | Agency RMBS [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Projected Collateral Prepayments 51.50% 72.40%
Interest-Only [Member] | Agency RMBS [Member] | Market Quotes [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Assets, Fair Value Disclosure $ 2,362,000 $ 3,713,000
Interest-Only [Member] | Agency RMBS [Member] | Market Quotes [Member] | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Non-Binding Third-Party Valuation 13.94 6.64
Interest-Only [Member] | Agency RMBS [Member] | Market Quotes [Member] | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Non-Binding Third-Party Valuation 18.58 15.90
Interest-Only [Member] | Agency RMBS [Member] | Market Quotes [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Non-Binding Third-Party Valuation 17.62 13.42
Interest-Only [Member] | Agency RMBS [Member] | Valuation, Income Approach [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 3,000 $ 15,000
Assets, Fair Value Disclosure $ 1,723,000 $ 1,941,000
Interest-Only [Member] | Agency RMBS [Member] | Valuation, Income Approach [Member] | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
LIBOR OAS 0.92% 2.24%
Interest-Only [Member] | Agency RMBS [Member] | Valuation, Income Approach [Member] | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
LIBOR OAS 50.70% 50.20%
Interest-Only [Member] | Agency RMBS [Member] | Valuation, Income Approach [Member] | Weighted Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value Inputs LIBOR OAS Including Negative 6.41% 9.50%
LIBOR OAS 6.44% 9.53%