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FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of Securities Using Fair Value Hierarchy (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
United States Contracts
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	$ 51,958,790	$ 36,882,450
Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	141,896,000	20,196,000
Fair Value, Inputs, Level 1 | United States Contracts
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	51,958,790	36,882,450
Fair Value, Inputs, Level 1 | Short-Term Investments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments, Fair Value Disclosure	$ 141,896,000	$ 20,196,000

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=117815213&loc=d3e19207-110258

+ Details

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X

- 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.

+ Details

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- Details

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