DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Derivative Assets and Liabilties (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Derivitive Financial Instruments [Line Items]
Restricted Cash And Cash Equivalents At Carrying Value	$ 3,750,730	$ 2,649,610
Other Liabilities	1,946,894	1,562,914
NotDesignatedAsHedgingInstrumentEconomicHedgeMember
Derivitive Financial Instruments [Line Items]
Derivative Asset Fair Value Gross Liability	242,000	0
Restricted Cash And Cash Equivalents At Carrying Value	111,000	442,000
TBA Contracts [Member] \| NotDesignatedAsHedgingInstrumentEconomicHedgeMember
Derivitive Financial Instruments [Line Items]
Derivative Asset Fair Value Gross Liability	242,000	0
Eurodollar Future Margin [Member] \| NotDesignatedAsHedgingInstrumentEconomicHedgeMember
Derivitive Financial Instruments [Line Items]
Restricted Cash And Cash Equivalents At Carrying Value	549,000	442,000
TBA Margin [Member] \| NotDesignatedAsHedgingInstrumentEconomicHedgeMember
Derivitive Financial Instruments [Line Items]
Other Liabilities	$ (438,000)	$ 0

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant