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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |  |
Estimated directors fees and expenses | $ 2,874 | $ 236 |  |
Licensing fee incurred | 290 | 116 |  |
Expense waiver | $ 30,045 | $ 16,022 |  |
Maximum [Member] |  |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |  |
Costs and expenses annual limit for reimbursement | 0.15% |  |  |
Licensing Agreements [Member] |  |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |  |
Fee percentage | 0.015% |  |  |
UNL [Member] |  |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |  |
Percentage of Contractual Obligated to Pay | 0.75% |  |  |
Estimated directors fees and expenses |  |  |  | $ 3,000
UNL [Member] | Scenario, Forecast [Member] |  |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |  |
Estimated investor tax reporting cost |  |  | $ 75,000 |
UNL [Member] | Related Public Funds [Member] |  |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |  |
Estimated directors fees and expenses |  |  |  | $ 1,223,400

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- Definition Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Amount of general expenses not normally included in Other Operating Costs and Expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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