XML 48 R29.htm IDEA: XBRL DOCUMENT
v3.25.2

Debt (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024
Debt [Abstract] |  |
Schedule of Changes in Debt Instruments | The following table sets forth a summary of the debt instruments and their changes during the six months ended June 31, 2025 and 2024 (in thousands):
|  | Convertible Notes |  | Tasly Convertible Debt |  | Senior Notes |  | Promissory Notes |  | PPP Loan
Balance at January 1, 2025 |  | $ | 18,419 |  | $ | 2,234 |  | $ | 25,268 |  | $ | 910 |  | $ | 1,376
Issuance of debt |  |  | — |  |  | — |  |  | 1,450 |  |  | — |  |  | —
Debt repayments |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
Change in fair value |  |  | — |  |  | 118 |  |  | — |  |  | — |  |  | —
Stated interest |  |  | 1,098 |  |  | 191 |  |  | 1,176 |  |  | 30 |  |  | 7
Amortization of debt discount and issuance costs |  |  | 16 |  |  | — |  |  | 1 |  |  | — |  |  | —
Balance at June 30, 2025 |  | $ | 19,533 |  | $ | 2,543 |  | $ | 27,895 |  | $ | 940 |  | $ | 1,383
Less: Current portion |  |  | 19,533 |  |  | 2,543 |  |  | 27,895 |  |  | 940 |  |  | 1,383
Long term debt |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | —
|  | Convertible Notes |  | Tasly Convertible Debt |  | Senior Notes |  | Promissory Notes |  | PPP Loan
Balance at December 31, 2023 |  | $ | 16,316 |  | $ | 1,714 |  | $ | 20,155 |  |  | $ | 849 |  | $ | 1,362
Issuance of debt |  |  | — |  |  | 16 |  |  | 1,120 |  |  |  | — |  |  | —
Debt repayments |  |  | — |  |  | — |  |  | (115 | ) |  |  | — |  |  | —
Change in fair value |  |  | — |  |  | 11 |  |  | — |  |  |  | — |  |  | —
Stated interest |  |  | 993 |  |  | 97 |  |  | 994 |  |  |  | 31 |  |  | 7
Amortization of debt discount and issuance costs |  |  | 39 |  |  | — |  |  | — |  |  |  | — |  |  | —
Balance at June 30, 2024 |  | $ | 17,348 |  | $ | 1,838 |  | $ | 22,154 |  |  | $ | 880 |  | $ | 1,369
Long term debt |  | $ | — |  | $ | — |  | $ | — |  |  | $ | — |  | $ | —
| The following table sets forth a summary of the debt instruments (which are all classified as current liabilities in the accompanying consolidated balance sheets and their changes during the years ended December 31, 2024 and 2023 (in thousands):
|  | Convertible Notes |  | Tasly Convertible Debt |  | Senior Notes |  | Promissory Notes |  | PPP Loan
Balance at January 1, 2023 |  | $ | 13,981 |  | $ | — |  | $ | 15,149 |  |  | $ | 576 |  |  | $ | 1,326
Issuance of debt |  |  | — |  |  | 1,600 |  |  | 3,235 |  |  |  | 375 |  |  |  | —
Debt repayments |  |  | — |  |  | — |  |  | — |  |  |  | (151 | ) |  |  | —
Change in fair value |  |  | — |  |  | 22 |  |  | — |  |  |  | — |  |  |  | —
Stated interest |  |  | 1,820 |  |  | 92 |  |  | 1,771 |  |  |  | 49 |  |  |  | 36
Amortization of debt discount and issuance costs |  |  | 515 |  |  | — |  |  | (0 | ) |  |  | — |  |  |  | —
Balance at December 31, 2023 |  |  | 16,316 |  |  | 1,714 |  |  | 20,155 |  |  |  | 849 |  |  |  | 1,362
Balance at January 1, 2024 |  | $ | 16,316 |  | $ | 1,714 |  | $ | 20,155 |  |  | $ | 849 |  |  | $ | 1,362
Issuance of debt |  |  | — |  |  | 16 |  |  | 3,210 |  |  |  | — |  |  |  | —
Debt repayments |  |  | — |  |  | — |  |  | (150 | ) |  |  | — |  |  |  | —
Change in fair value |  |  | — |  |  | 311 |  |  | — |  |  |  | — |  |  |  | —
Stated interest |  |  | 2,057 |  |  | 193 |  |  | 2,053 |  |  |  | 61 |  |  |  | 14
Amortization of debt discount and issuance costs |  |  | 46 |  |  | — |  |  | — |  |  |  | — |  |  |  | —
Balance at December 31, 2024 |  | $ | 18,419 |  | $ | 2,234 |  | $ | 25,268 |  |  | $ | 910 |  |  | $ | 1,376
Less: Current portion |  |  | 18,419 |  |  | 2,234 |  |  | 25,268 |  |  |  | 910 |  |  |  | 1,376
Long term debt |  | $ | — |  | $ | — |  | $ | — |  |  | $ | — |  |  | $ | —
Schedule of Future Minimum Payments for the Convertible Notes Payable | As of June 30, 2025, future minimum payments for the convertible notes payable were as follows (in thousands):
|  | Convertible Notes |  | Tasly Convertible Debt |  | Senior Notes
As of June 30, 2025 |  | $ | 19,603 |  |  | $ | 2,287 |  |  | $ | 26,003 |
Total future payments |  |  | 19,603 |  |  |  | 2,287 |  |  |  | 26,003 |
Less: fair value remeasurement |  |  | — |  |  |  | 451 |  |  |  | — |
Less: unamortized debt discount |  |  | — |  |  |  | — |  |  |  | 1,967 |
Less: interest |  |  | (70 | ) |  |  | (195 | ) |  |  | (75 | )
Total convertible notes payable |  | $ | 19,533 |  |  | $ | 2,543 |  |  | $ | 27,895 |
| As of December 31, 2024, future minimum payments for the convertible notes payable were as follows (in thousands):
|  | Convertible Notes |  | Tasly Convertible Debt |  | Senior Notes
Total future principal payments |  | $ | 19,533 |  |  | $ | 1,998 |  |  | $ | 24,396 |
Add: fair value remeasurement |  |  | — |  |  |  | 333 |  |  |  | — |
Add (less): unamortized debt (premium) discount |  |  | (2 | ) |  |  | — |  |  |  | 2,055 |
Less: interest |  |  | (1,112 | ) |  |  | (97 | ) |  |  | (1,183 | )
Total convertible notes payable |  | $ | 18,419 |  |  | $ | 2,234 |  |  | $ | 25,268 |
Schedule of Contractual Future Minimum Payments for the PPP Loan | As of June 30, 2025, the contractual future minimum payments for the PPP Loan 2 were as follows (in thousands):
Year Ending December 31, |  | Amount
2025 (remainder) |  |  | 1,245
2026 |  |  | 145
Total |  | $ | 1,390
| As of December 31, 2024, the contractual future minimum payments for the PPP Loan 2 were as follows (in thousands):
Year Ending December 31, |  | Amount
2025 |  |  | 1,231
2026 |  |  | 145
Total |  | $ | 1,376

X
- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 04 -Subparagraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock
Namespace Prefix: | srt_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
Name: | us-gaap_ScheduleOfDebtInstrumentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration