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Note 1 - Nature of Activities and Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Disaggregation of Revenue [Table Text Block]
  

For the three months ended June 30,

  

For the six months ended June 30,

 
  

2023

  

2022

  

2023

  

2022

 

Ethanol sales

 $8,647  $47,656  $9,015  $85,551 

Wet distiller's grains sales

  2,553   15,150   2,553   26,666 

Other sales

  132   3,085   239   5,715 
  $11,332  $65,891  $11,807  $117,932 
  

For the three months ended June 30,

  

For the six months ended June 30,

 
  

2023

  

2022

  

2023

  

2022

 

Biodiesel sales

 $32,811  $-  $34,001  $- 

Other sales

  759   10   1,039   18 
  $33,570  $10  $35,040  $18 
Schedule of Cash and Cash Equivalents [Table Text Block]
  

As of

 
  

June 30, 2023

  

December 31, 2022

 

Cash and cash equivalents

 $3,494  $4,313 

Restricted cash included in other current assets

  10   725 

Restricted cash included in other assets

  1,961   1,961 

Total cash, cash equivalents, and restricted cash shown in the statement of cash flows

 $5,465  $6,999 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

As of

 
  

June 30, 2023

  

June 30, 2022

 

Series B preferred (post split basis)

  126   127 

Common stock options and warrants

  6,107   4,748 

Debt with conversion feature at $30 per share of common stock

  1,251   1,228 

Total number of potentially dilutive shares excluded from the diluted net (loss) per share calculation

  7,484   6,103