Note 1 - Basis of Presentation (Details Textual) - Revenue Benchmark [Member] - Customer Concentration Risk [Member] - Three Major Oil and Gas Companies [Member] |
3 Months Ended | 12 Months Ended |
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Mar. 31, 2020 |
Dec. 31, 2019 |
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Concentration Risk, Percentage | 57.00% | 63.00% |
Number of Major Customers | 3 |
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- Definition 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
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- Definition Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. No definition available.
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