Note 1 - Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Current Ownership Hierarchy [Table Text Block]

Name	State of Formation	Ownership	Business
Heat Waves Hot Oil Service LLC	Colorado	100% by Enservco	Oil and natural gas well services, including logistics and stimulation.
Adler Hot Oil Service, LLC	Delaware	100% by Enservco	Oil and natural gas well services, including logistics and stimulation.
Heat Waves Water Management LLC	Colorado	100% by Enservco	Water Transfer and Water Treatment Services.
Dillco Fluid Service, Inc.	Kansas	100% by Enservco	Discontinued operation in 2018.
HE Services LLC (“ HES”)	Nevada	100% by Heat Waves	No active business operations. Owns construction equipment used by Heat Waves.