Note 1 - Basis of Presentation - Current Ownership Hierarchy (Details)	12 Months Ended
	Dec. 31, 2017
Dillco Fluid Service, Inc. at Kansas [Member]
Subsidiary or Equity Method Investee	100.00%
Heat Waves Hot Oil Service LLC at Colorado [Member]
Subsidiary or Equity Method Investee	100.00%
Heat Waves Water Management LLC at Colorado [Member]
Subsidiary or Equity Method Investee	100.00%
HE Services LLC at Nevada [Member]
Subsidiary or Equity Method Investee	100.00%
Real GC, LLC at Colorado [Member]
Subsidiary or Equity Method Investee	100.00%