Note 16 - Subsequent Events	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	Note 16 — Subsequent Events On March 17, 2021, the Company entered into a Series C Convertible Preferred Stock Purchase Agreement (collectively, the “Series C Stock Purchase Agreements”) with each of (i) York Capital Management, L.P. and certain of its affiliates (“York”), (ii) certain affiliates of Bardin Hill Investment Partners LP (“Bardin Hill”), and (iii) Avenue Energy Opportunities Fund II, L.P (“Avenue” and together with York and Bardin Hill, the “Purchasers”) pursuant to which the Company agreed to sell, and the Purchasers agreed to purchase shares of the Company’s Series C Convertible Preferred Stock, par value $0.0001 per share (the “Series C Preferred Stock”), together with associated warrants, for an aggregate purchase price of $24.5 million. The consummation of the transactions contemplated by the Series C Stock Purchase Agreements occurred at multiple closings on or prior to March 22, 2021. We have evaluated subsequent events through March 25, 2021, the date the financial statements were issued. Any material subsequent events that occurred during this time have been properly recognized and/or disclosed in these financial statements.

Note 16 - Subsequent Events

12 Months Ended

Dec. 31, 2020

Note 16 — Subsequent Events

On March 17, 2021, the Company entered into a Series C Convertible Preferred Stock Purchase Agreement (collectively, the “Series C Stock Purchase Agreements”) with each of (i) York Capital Management, L.P. and certain of its affiliates (“York”), (ii) certain affiliates of Bardin Hill Investment Partners LP (“Bardin Hill”), and (iii) Avenue Energy Opportunities Fund II, L.P (“Avenue” and together with York and Bardin Hill, the “Purchasers”) pursuant to which the Company agreed to sell, and the Purchasers agreed to purchase shares of the Company’s Series C Convertible Preferred Stock, par value $0.0001 per share (the “Series C Preferred Stock”), together with associated warrants, for an aggregate purchase price of $24.5 million. The consummation of the transactions contemplated by the Series C Stock Purchase Agreements occurred at multiple closings on or prior to March 22, 2021.

We have evaluated subsequent events through March 25, 2021, the date the financial statements were issued. Any material subsequent events that occurred during this time have been properly recognized and/or disclosed in these financial statements.