XML 39 R33.htm IDEA: XBRL DOCUMENT v3.19.3
Note 1 - Basis of Presentation - Current Ownership Hierarchy (Details)
9 Months Ended
Sep. 30, 2019
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%