Quarterly report pursuant to Section 13 or 15(d)

Investments (Details)

v3.21.1
Investments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]    
Debt Securities, Held-to-maturity $ 89,100 $ 150,400
Debt Securities, Available-for-sale 115,200 0
Marketable Securities [Line Items]    
Short-term investments 191,668 125,979
Long-term investments 12,603 24,380
Total investments 204,271 150,359
Interest Receivable 400 500
Unrealized gains on available-for-sale securities 6  
Cashable Guaranteed Investment Certificate (GIC)    
Marketable Securities [Line Items]    
Short-term investments 2,502 2,000
Corporate Bond    
Marketable Securities [Line Items]    
Short-term investments 41,524 40,372
Commercial Paper    
Marketable Securities [Line Items]    
Short-term investments 133,907 67,747
Treasury Bill    
Marketable Securities [Line Items]    
Short-term investments 5,910 7,999
Treasury Bond    
Marketable Securities [Line Items]    
Short-term investments 5,021 5,045
Yankee Bond    
Marketable Securities [Line Items]    
Short-term investments 2,804 2,816
Corporate Bonds    
Marketable Securities [Line Items]    
Long-term investments $ 12,603 $ 24,380