Fair Value Measurements (Details 1) - Level 3 - Fair Value, Recurring	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Minimum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.018
Minimum | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.026
Minimum | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input, Remaining Life	9 months 18 days
Maximum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.097
Maximum | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.037
Maximum | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input, Remaining Life	4 years 11 months 19 days
Weighted Average [Member] | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input, Remaining Life	2 years 10 months 24 days
Measurement Input, Price Volatility [Member] | Minimum | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input	0.189
Measurement Input, Price Volatility [Member] | Maximum | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input	1.587
Measurement Input, Price Volatility [Member] | Weighted Average [Member] | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input	0.30
Measurement Input, Prepayment Rate [Member] | Minimum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.050
Measurement Input, Prepayment Rate [Member] | Minimum | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.100
Measurement Input, Prepayment Rate [Member] | Maximum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.161
Measurement Input, Prepayment Rate [Member] | Maximum | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.150
Measurement Input, Prepayment Rate [Member] | Weighted Average [Member] | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.109
Measurement Input, Prepayment Rate [Member] | Weighted Average [Member] | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.121
Measurement Input, Default Rate [Member] | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)		0.020
Measurement Input, Default Rate [Member] | Minimum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.005
Measurement Input, Default Rate [Member] | Maximum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.302
Measurement Input, Default Rate [Member] | Weighted Average [Member] | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.026
Measurement Input, Default Rate [Member] | Weighted Average [Member] | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.020
Measurement Input, Loss Severity [Member] | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.600
Measurement Input, Loss Severity [Member] | Minimum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.017
Measurement Input, Loss Severity [Member] | Maximum | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	1.652
Measurement Input, Loss Severity [Member] | Weighted Average [Member] | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.532
Measurement Input, Loss Severity [Member] | Weighted Average [Member] | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.600
Measurement Input, Discount Rate | Weighted Average [Member] | Private Label CMOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate (Deprecated 2018-01-31)	0.067
Measurement Input, Discount Rate | Weighted Average [Member] | Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.029
Measurement Input, Risk Free Interest Rate [Member] | Minimum | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input	0.001
Measurement Input, Risk Free Interest Rate [Member] | Maximum | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input	0.004
Measurement Input, Risk Free Interest Rate [Member] | Weighted Average [Member] | Warrant [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity Warrants, Measurement Input	0.002