Quarterly report pursuant to Section 13 or 15(d)

Ownership Percentage (Details)

v3.21.1
Ownership Percentage (Details)
Mar. 31, 2021
Zeolyst International  
Schedule of Equity Method Investments  
Ownership percentage 50.00%
Zeolyst C.V.  
Schedule of Equity Method Investments  
Ownership percentage 50.00%