Note 7 - Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long-term debt	$ 2,845	$ 6,460
Less debt discount	(119)	(167)
Less current portion	(147)	(4,149)
Long-term debt, net of debt discount and current portion	2,579	2,144
Real Estate Loan 1 [Member]
Long-term debt	218	258
Vehicle Loans for Trucks [Member]
Long-term debt	74	113
Note Payable To Seller Of Heat Waves [Member]
Long-term debt	53	89
Seller Subordinated Note [Member] | Subordinated Debt [Member]
Long-term debt		4,000	[1]
Subordinated Promissory Note 1 [Member] | Subordinated Debt [Member]
Long-term debt	1,000	1,000
Subordinated Promissory Note 2 [Member] | Subordinated Debt [Member]
Long-term debt	1,000	1,000
Subordinated Promissory Note 3 [Member] | Subordinated Debt [Member]
Long-term debt	$ 500

[1] In accordance with the Settlement Agreement discussed in Notes 4 the agreed upon due date was extended to April 10, 2019, subject to a nine-day grace period. On April 19, 2019, Enservco made the final payment to settle the principal balance and accrued interest on the Seller Subordinated Note and has no further obligations to the Seller.