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Segment Reporting
 9 Months Ended
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,
 2025202420252024
Revenue$17,244 $12,507 $49,944 $41,986 
Cost of revenue7,169 5,526 20,351 17,351 
Gross profit10,075 6,981 29,593 24,635 
Segment operating expenses:
Employee expense8,418 7,007 23,501 20,422 
Outside services1,103 992 3,567 3,181 
Facilities related921 859 2,739 2,824 
Travel & entertainment724 693 2,175 1,813 
Stock compensation535 170 1,280 1,227 
Depreciation and amortization281 256 810 787 
Other1
1,193 1,667 4,616 4,634 
Total segment operating expenses13,175 11,644 38,688 34,888 
Loss from operations(3,100)(4,663)(9,095)(10,253)
Interest expense(1,319)(562)(2,988)(1,671)
Loss on extinguishment of debt— — (295)— 
Change in fair value of warrant liability(2,670)— (3,108)— 
Interest income3 197 246 570 
Loss before income taxes(7,086)(5,028)(15,240)(11,354)
Income tax expense(1)— (38)— 
Segment net loss$(7,087)$(5,028)$(15,278)$(11,354)
1Other 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.