Assets and Liabilities Recorded at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	$ 83,988,399	$ 117,831,032
Eurodollar Futures Contracts	400,000	500,000
Investment In Orchid	13,852,707	12,810,728
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	83,988,000	117,831,000
Eurodollar Futures Contracts	402,000	476,000
Retained Interests	1,124,000	1,900,000
Investment In Orchid	13,853,000	12,811,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Eurodollar Futures Contracts	402,000	476,000
Retained Interests	0	0
Investment In Orchid	13,853,000	12,811,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	83,988,000	117,831,000
Eurodollar Futures Contracts	0	0
Retained Interests	0	0
Investment In Orchid	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Eurodollar Futures Contracts	0	0
Retained Interests	1,124,000	1,900,000
Investment In Orchid	$ 0	$ 0