Note 1 - Basis of Presentation - Current Ownership Hierarchy (Details) |
3 Months Ended |
|---|---|
Mar. 31, 2022 | |
| Heat Waves Hot Oil Service LLC at Colorado [Member] | |
| Subsidiary or Equity Method Investee | 100.00% |
| Adler Hot Oil Service, LLC [Member] | |
| Subsidiary or Equity Method Investee | 100.00% |
| Heat Waves Water Management LLC at Colorado [Member] | |
| Subsidiary or Equity Method Investee | 100.00% |
| Dillco Fluid Service, Inc. at Kansas [Member] | |
| Subsidiary or Equity Method Investee | 100.00% |
| HE Services LLC at Nevada [Member] | |
| Subsidiary or Equity Method Investee | 100.00% |