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Note 1 - Basis of Presentation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 12, 2022 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Jan. 31, 2023
Revenue as Percentage of Sales Associated with New Wind Turbine Installations |  |  |  | 43.00% | 51.00% |  |
Debt and Lease Obligation |  | $ 23,353 |  | $ 23,353 |  |  |
Debt, Current |  | 13,637 |  | 13,637 |  |  |
Long-Term Debt |  | $ 16,948 |  | $ 16,948 |  | $ 12,153 |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 |
Accounts Receivable, Sale |  | $ 22,540 | $ 12,084 | $ 42,579 | $ 31,081 |  |
Accounts Receivable, Sale, Discount Fees |  | 583 | $ 334 | 1,099 | $ 649 |  |
Long-Term Contract with Customer [Member] |  |  |  |  |  |  |
Contract with Customer, Asset, before Allowance for Credit Loss |  |  |  |  |  |  | $ 175,000
The Sales Agreement [Member] |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 1.000 |  |  |  |  |  |
Sales Agent Commission Percentage | 2.75% |  |  |  |  |  |
Sale of Stock, Common Stock Available for Issuance, Value |  | 11,667 |  | 11,667 |  |  |
The Sales Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |
Value of Shares Issuable, Maximum | $ 12,000 |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |
Line of Credit, Current |  | 9,919 |  | 9,919 |  |  |
The 2022 Credit Facility [Member] |  |  |  |  |  |  |
Long-Term Debt |  | 5,323 |  | 5,323 |  |  |
Line of Credit, Current |  | $ 15,242 |  | $ 15,242 |  |  |

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