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Segment Reporting | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Segment Reporting | Segment Reporting Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker (CODM) in making decisions regarding resource allocation and assessing performance. The Company views its operations as, and manages its business in, one operating segment focused on the design, development and commercialization of testing products which allow for the differential diagnosis, prognosis and monitoring of complex rheumatic, autoimmune and autoimmune-related disease. Segment revenue is primarily derived from the sale of the Company’s testing products, most of which is attributable to its AVISE® CTD test. The Company’s CODM is its Chief Executive Officer. The CODM assesses performance for the segment and decides how to allocate resources based on revenue and net loss as reported on the condensed statements of operations, after taking into account the Company’s strategic priorities, its cash balance and its expected use of cash. The CODM considers budget/forecast versus actual results on a quarterly basis when making decisions about the allocation of resources. The measure of segment assets is reported on the balance sheet as total assets and were $62.8 million and $44.7 million as of September 30, 2025 and December 31, 2024, respectively. Segment revenue and net loss, including significant segment expenses regularly provided to the CODM are as follows (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Revenue |  | $ | 17,244 |  |  | $ | 12,507 |  |  | $ | 49,944 |  |  | $ | 41,986 |
Cost of revenue |  | 7,169 |  |  | 5,526 |  |  | 20,351 |  |  | 17,351 |
Gross profit |  | 10,075 |  |  | 6,981 |  |  | 29,593 |  |  | 24,635 |
Segment operating expenses: |  |  |  |  |  |  |  |
Employee expense |  | 8,418 |  |  | 7,007 |  |  | 23,501 |  |  | 20,422 |
Outside services |  | 1,103 |  |  | 992 |  |  | 3,567 |  |  | 3,181 |
Facilities related |  | 921 |  |  | 859 |  |  | 2,739 |  |  | 2,824 |
Travel & entertainment |  | 724 |  |  | 693 |  |  | 2,175 |  |  | 1,813 |
Stock compensation |  | 535 |  |  | 170 |  |  | 1,280 |  |  | 1,227 |
Depreciation and amortization |  | 281 |  |  | 256 |  |  | 810 |  |  | 787 |
Other 1 |  | 1,193 |  |  | 1,667 |  |  | 4,616 |  |  | 4,634 |
Total segment operating expenses |  | 13,175 |  |  | 11,644 |  |  | 38,688 |  |  | 34,888 |
Loss from operations |  | (3,100) |  |  | (4,663) |  |  | (9,095) |  |  | (10,253) |
Interest expense |  | (1,319) |  |  | (562) |  |  | (2,988) |  |  | (1,671) |
Loss on extinguishment of debt |  | — |  |  | — |  |  | (295) |  |  | — |
Change in fair value of warrant liability |  | (2,670) |  |  | — |  |  | (3,108) |  |  | — |
Interest income |  | 3 |  |  | 197 |  |  | 246 |  |  | 570 |
Loss before income taxes |  | (7,086) |  |  | (5,028) |  |  | (15,240) |  |  | (11,354) |
Income tax expense |  | (1) |  |  | — |  |  | (38) |  |  | — |
Segment net loss |  | $ | (7,087) |  |  | $ | (5,028) |  |  | $ | (15,278) |  |  | $ | (11,354) |
1 Other segment items included in Segment net loss include insurance expenses, trade show and conference expenses, fulfillment expenses, board compensation, clinical trial expenses, collaboration expenses and bank fees, among others.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name 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