Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Variable Interest Entities (Details Textual)

v3.21.2
Note 6 - Variable Interest Entities (Details Textual)
6 Months Ended
Jun. 30, 2021
Rubicon LLC [Member]  
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage 50.00%
Arabian Amines Company [Member]  
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage 50.00%