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Note 5 - Due From Mullen (Details Textual) - USD ($) | Aug. 11, 2020 | Jun. 30, 2021
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RBL Capital Group, LLC [Member] |  |
Proceeds from Notes Payable, Total | $ 500,000 |
Receivable with Imputed Interest, Face Amount | $ 500,000 |
Receivable with Imputed Interest, Effective Yield (Interest Rate) | 14.00% |
Mullen [Member] |  |
Receivable with Imputed Interest, Face Amount | $ 500,000 |
Receivable with Imputed Interest, Effective Yield (Interest Rate) | 14.00% |
Registration Filing, Late Fees Owed |  | $ 1,500,000

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