Annual report pursuant to Section 13 and 15(d)

Other Long Term Investments - Narrative (Details)

v3.21.1
Other Long Term Investments - Narrative (Details)
$ in Millions
3 Months Ended
Dec. 31, 2020
USD ($)
shares
Schedule of Equity Method Investments [Line Items]  
Payments to acquire equity method investments | $ $ 2.5
Cardinal Ventures Holdings | Common Class A  
Schedule of Equity Method Investments [Line Items]  
Number of common shares sold under offering (in shares) 600,000
Cardinal Ventures Holdings | Common Class B  
Schedule of Equity Method Investments [Line Items]  
Number of common shares sold under offering (in shares) 2,500,000