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v3.23.3

Basis of Presentation and Summary of Significant Accounting Policies - Investment Categories (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale |  |
Amortized cost | $ 152,299 | $ 108,778
Gross unrealized gains | 34 | 415
Gross unrealized losses | (5,786) | (5,451)
Estimated fair value | 146,547 | 103,742
Total short-term investments | 171,227 | 166,864
Bank deposits |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 28,972 | 5,012
Gross unrealized gains | 11 | 2
Gross unrealized losses | (11) | (34)
Estimated fair value | 28,972 | 4,980
Bond fund |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 84,811 | 81,815
Gross unrealized gains | 0 | 0
Gross unrealized losses | (808) | (1,050)
Estimated fair value | 84,003 | 80,765
Commercial paper |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 18,935 | 7,211
Gross unrealized gains | 0 | 3
Gross unrealized losses | (4) | 0
Estimated fair value | 18,931 | 7,214
Corporate bonds |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 8,077 | 6,701
Gross unrealized gains | 1 | 13
Gross unrealized losses | (35) | (58)
Estimated fair value | 8,043 | 6,656
Corporate equity securities |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 5,775 | 5,807
Gross unrealized gains | 0 | 262
Gross unrealized losses | (4,903) | (4,239)
Estimated fair value | 872 | 1,830
Municipal bonds |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 1,027 |
Gross unrealized gains | 0 |
Gross unrealized losses | (6) |
Estimated fair value | 1,021 |
US government securities |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 4,702 | 2,232
Gross unrealized gains | 0 | 0
Gross unrealized losses | (19) | (70)
Estimated fair value | 4,683 | 2,162
Warrants |  |
Debt Securities, Available-for-sale |  |
Amortized cost | 0 | 0
Gross unrealized gains | 22 | 135
Gross unrealized losses | 0 | 0
Estimated fair value | 22 | 135
Common Stock |  |
Debt Securities, Available-for-sale |  |
Viking common stock | $ 24,680 | $ 63,122

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