Note 1 - Basis of Presentation (Details Textual) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Gas Imbalances	$ 0		$ 0
Revenues, Total	2,270	$ 1,540
Cost of Goods and Services Sold, Total	2,902	$ 842
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 0		$ 0

Represents the monetary amount of Gas imbalances, as of the indicated date.

No definition available.

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

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- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

+ References

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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