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v3.23.2

Basis of Presentation and Summary of Significant Accounting Policies - Investment Categories (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 158,508 | $ 108,778
Gross unrealized gains | 288 | 415
Gross unrealized losses | (4,340) | (5,451)
Estimated fair value | 154,456 | 103,742
Total short-term investments | 190,596 | 166,864
Bank deposits |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 36,327 | 5,012
Gross unrealized gains | 7 | 2
Gross unrealized losses | (22) | (34)
Estimated fair value | 36,312 | 4,980
Bond fund |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 83,695 | 81,815
Gross unrealized gains | 0 | 0
Gross unrealized losses | (808) | (1,050)
Estimated fair value | 82,887 | 80,765
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 18,582 | 7,211
Gross unrealized gains | 1 | 3
Gross unrealized losses | (8) | 0
Estimated fair value | 18,575 | 7,214
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 6,197 | 6,701
Gross unrealized gains | 1 | 13
Gross unrealized losses | (39) | (58)
Estimated fair value | 6,159 | 6,656
Corporate equity securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 5,775 | 5,807
Gross unrealized gains | 0 | 262
Gross unrealized losses | (3,436) | (4,239)
Estimated fair value | 2,339 | 1,830
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 1,016 |
Gross unrealized gains | 0 |
Gross unrealized losses | (10) |
Estimated fair value | 1,006 |
US government securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 6,916 | 2,232
Gross unrealized gains | 1 | 0
Gross unrealized losses | (17) | (70)
Estimated fair value | 6,900 | 2,162
Warrants |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | 0 | 0
Gross unrealized gains | 278 | 135
Gross unrealized losses | 0 | 0
Estimated fair value | 278 | 135
Common Stock |  |
Debt Securities, Available-for-sale [Line Items] |  |
Viking common stock | $ 36,140 | $ 63,122

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