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Note 2 - Use of Estimates and Reclassifications | 3 Months Ended
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Mar. 31, 2022
Notes to Financial Statements |
Use of Estimates and Reclassifications Disclosure [Text Block] |
2. | USE OF ESTIMATES AND RECLASSIFICATIONS
The Company’s reports for interim periods utilize numerous estimates of general and administrative expenses and other costs for the full year. Future actual amounts may differ from these estimates. Amounts reflected in these condensed consolidated interim statements are not necessarily indicative of results for a full year.

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- Definition This element provides an entity's explanation that the preparation of financial statements in conformity with generally accepted accounting principles requires the use of management estimates. Also includes the disclosure of accounting policy for reclassifications that affects the comparability of the financial statements. + References No definition available. + Details
Name: | mlp_UseOfEstimatesAndReclassificationsDisclosureTextBlock
Namespace Prefix: | mlp_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DisclosureTextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration