Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Investment Categories (Details)

v3.22.2.2
Basis of Presentation and Summary of Significant Accounting Policies - Investment Categories (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized cost $ 103,544 $ 292,225
Gross unrealized gains 544 842
Gross unrealized losses (5,062) (2,370)
Estimated fair value 99,026 290,697
Total short-term investments 117,291 321,586
Bank deposits    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 2,506 63,389
Gross unrealized gains 0 13
Gross unrealized losses (53) (21)
Estimated fair value 2,453 63,381
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 4,887 29,308
Gross unrealized gains 0 17
Gross unrealized losses (107) (38)
Estimated fair value 4,780 29,287
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost   36,008
Gross unrealized gains   2
Gross unrealized losses   (12)
Estimated fair value   35,998
Corporate equity securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 5,807 5,807
Gross unrealized gains 312 402
Gross unrealized losses (3,615) (2,027)
Estimated fair value 2,504 4,182
Mutual fund    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 88,115 152,136
Gross unrealized gains 0 0
Gross unrealized losses (1,203) (249)
Estimated fair value 86,912 151,887
US government securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 2,229 5,577
Gross unrealized gains 0 0
Gross unrealized losses (84) (23)
Estimated fair value 2,145 5,554
Warrants    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 0 0
Gross unrealized gains 232 408
Gross unrealized losses 0 0
Estimated fair value 232 408
Common Stock    
Debt Securities, Available-for-sale [Line Items]    
Viking common stock $ 18,265 $ 30,889