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v3.23.2

Investments in marketable securities - Marketable Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Accrued investment income receivable | $ 600 | $ 600 |  | $ 600
Realized gains or losses | 100 | 100 | $ 0 |
Cash and Cash Equivalents |  |  |  |
Cash and Cash Equivalents [Abstract] |  |  |  |
Cash Equivalents, at Carrying Value | 21,816 | 21,816 |  | 23,218
Cash Equivalents, Fair Value Disclosure | 21,816 | 21,816 |  | 23,218
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Gross Unrealized Gain | 0 | 0 |  |
Gross Unrealized Loss | 0 | 0 |  |
Short Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 126,468 | 126,468 |  | 117,674
Gross Unrealized Gain | 0 | 0 |  | 0
Gross Unrealized Loss | (1,181) | (1,181) |  | (1,537)
Fair Value | 125,287 | 125,287 |  | 116,137
Long Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 11,160 | 11,160 |  | 38,129
Gross Unrealized Gain | 0 | 0 |  | 0
Gross Unrealized Loss | (103) | (103) |  | (766)
Fair Value | 11,057 | 11,057 |  | 37,363
Money market | Cash and Cash Equivalents |  |  |  |
Cash and Cash Equivalents [Abstract] |  |  |  |
Money Market Funds, at Carrying Value | 21,816 | 21,816 |  | 23,218
US treasury bills | Short Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 7,834 | 7,834 |  | 8,483
Gross Unrealized Gain | 0 | 0 |  | 0
Gross Unrealized Loss | (4) | (4) |  | (16)
Fair Value | 7,830 | 7,830 |  | 8,467
US treasury bills | Long Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost |  |  |  | 25,433
Gross Unrealized Gain |  |  |  | 0
Gross Unrealized Loss |  |  |  | (336)
Fair Value |  |  |  | 25,097
US government agency bonds | Short Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 35,624 | 35,624 |  | 26,686
Gross Unrealized Gain | 0 | 0 |  | 0
Gross Unrealized Loss | (314) | (314) |  | (424)
Fair Value | 35,310 | 35,310 |  | 26,262
US government agency bonds | Long Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost |  |  |  | 3,724
Gross Unrealized Gain |  |  |  | 0
Gross Unrealized Loss |  |  |  | (130)
Fair Value |  |  |  | 3,594
US corporate bonds | Short Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 56,066 | 56,066 |  | 27,144
Gross Unrealized Gain | 0 | 0 |  | 0
Gross Unrealized Loss | (507) | (507) |  | (303)
Fair Value | 55,559 | 55,559 |  | 26,841
US corporate bonds | Long Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 9,161 | 9,161 |  |
Gross Unrealized Gain | 0 | 0 |  |
Gross Unrealized Loss | (66) | (66) |  |
Fair Value | 9,095 | 9,095 |  |
Yankee bonds | Long Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 1,999 | 1,999 |  |
Gross Unrealized Gain | 0 | 0 |  |
Gross Unrealized Loss | (37) | (37) |  |
Fair Value | 1,962 | 1,962 |  |
US government bonds | Short Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost | 26,944 | 26,944 |  | 55,361
Gross Unrealized Gain | 0 | 0 |  | 0
Gross Unrealized Loss | (356) | (356) |  | (794)
Fair Value | $ 26,588 | $ 26,588 |  | 54,567
US government bonds | Long Term Marketable Securities |  |  |  |
Debt Securities, Available-for-Sale [Abstract] |  |  |  |
Amortized Cost |  |  |  | 8,972
Gross Unrealized Gain |  |  |  | 0
Gross Unrealized Loss |  |  |  | (300)
Fair Value |  |  |  | $ 8,672

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