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FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation of Securities Using Fair Value Hierarchy) (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	$ 16,534,641	$ 11,072,567
Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	83,283,254	85,783,036
Fair Value, Inputs, Level 1 | United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	16,534,641	11,072,567
Fair Value, Inputs, Level 1 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	83,283,254	85,783,036
Fair Value, Inputs, Level 2 | United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | United States
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0

X

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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