Annual report pursuant to Section 13 and 15(d)

Cover
- Cover Page
- Audit Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Investments (Details)

v3.22.0.1

Investments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Debt securities, Held-to-maturity	$ 19,200	$ 150,400
Debt securities, Available-for-sale	214,900	0
Marketable Securities [Line Items]
Total short term investments	234,178	125,979
Corporate Bonds - total long term investments	0	24,380
Total investments	234,178	150,359
Interest receivable	100	500
Unrealized gains on available-for-sale securities	(47)	0
Cashable Guaranteed Investment Certificate
Marketable Securities [Line Items]
Total short term investments	3,140	2,000
Corporate Bond
Marketable Securities [Line Items]
Total short term investments	21,820	40,372
Commercial Paper
Marketable Securities [Line Items]
Total short term investments	206,724	67,747
Treasury Bill
Marketable Securities [Line Items]
Total short term investments	2,494	7,999
Treasury Bond
Marketable Securities [Line Items]
Total short term investments	0	5,045
Yankee Bond
Marketable Securities [Line Items]
Total short term investments	0	2,816
Corporate Bonds
Marketable Securities [Line Items]
Corporate Bonds - total long term investments	$ 0	$ 24,380

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