Note 11 - Major Customers (Details Textual) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	1 Months Ended	8 Months Ended
Sep. 30, 2020	Aug. 21, 2020
Lion Oil Trading and Transportation, LLC [Member]
Concentration Risk, Percentage	97.00%	49.00%
Enlink Crude Purchasing, LLC [Member]
Concentration Risk, Percentage		44.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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