Annual report pursuant to Section 13 and 15(d)

Other Long Term Investments (Details)

v3.21.1
Other Long Term Investments (Details) - Cardinal Ventures Holdings
Dec. 31, 2020
Common Class A  
Schedule of Equity Method Investments [Line Items]  
Ownership interest 14.10%
Common Class B  
Schedule of Equity Method Investments [Line Items]  
Ownership interest 28.10%