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Notes held for investment (Details) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) item | Jun. 30, 2022 USD ($) item | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total notes held for investment |  |  | $ 6,100 | $ 5,372
Interest income from promissory notes |  |  | 483 | 449
Long-term investments |  |  | 512 | 512
Investments in SYNAPS Dx |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Long-term investments |  |  | 512 | 512
Monarch |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Changes in fair value |  |  | 128 | 307
Senior secured promissory notes |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total notes held for investment |  |  | 1,000 | 1,000
Interest rate (as a percent) |  | 5.00% |  |
Number of notes receivable | item |  | 2 |  |
Term (in years) |  | 3 years |  |
Aggregate principal amount |  | $ 1,000 |  |
Senior secured promissory notes | Investments in Mellitus Health, Inc. |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Long-term investments |  |  | 1,000 |
Secured convertible promissory note |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total notes held for investment |  |  | 5,100 | 4,372
Secured convertible promissory note | Monarch |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Aggregate principal amount |  |  | 5,000 |
Maximum amount of available funding | $ 5,000 |  |  |
Transaction fee | $ 100 |  |  |
Option to extend the maturity date | item | 2 |  |  |
Period to extend the maturity date | 1 year |  |  |
Investment in debt securities |  |  | $ 5,000 | $ 4,372
Interest rate | 10.00% |  |  |

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