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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]  
Schedule of Concentration of Risk, by Risk Factor and Significant Payer For each significant payor and customer, revenue as a percentage of total revenue and accounts receivable as a percentage of total accounts receivable are as follows:
 
 Revenue
 Three Months Ended
March 31,
 20252024
Medicare23 %29 %
Medicare Advantage18 %17 %
United Healthcare*10 %

Accounts Receivable, Net
 March 31, 2025December 31, 2024
Medicare24 %13 %
Medicare Advantage19 %25 %
*Less than 10%.
Schedule of Disaggregation of Revenue
The following table includes the Company's revenues as disaggregated by payor and customer category (in thousands):
 
 Three Months Ended March 31,
 20252024
Revenue:
Commercial$8,185 $6,863 
Government3,637 4,186 
Client direct bill(1)3,600 3,284 
Other(2)76 82 
Total revenue$15,498 $14,415 
(1)Includes hospitals, other laboratories, etc.
(2)Includes patient self-pay.
Schedule of Cash and Cash Equivalents
Cash, cash equivalents, and restricted cash presented in the accompanying condensed statements of cash flows consist of the following (in thousands):
 
 March 31, 2025December 31, 2024
Cash and cash equivalents$11,194 $22,036 
Restricted cash200 200 
Total cash, cash equivalents and restricted cash$11,394 $22,236 
Schedule of Restricted Cash and Cash Equivalents
Cash, cash equivalents, and restricted cash presented in the accompanying condensed statements of cash flows consist of the following (in thousands):
 
 March 31, 2025December 31, 2024
Cash and cash equivalents$11,194 $22,036 
Restricted cash200 200 
Total cash, cash equivalents and restricted cash$11,394 $22,236 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially dilutive securities not included in the calculation of diluted net loss per share, because to do so would be anti-dilutive, are as follows (in common stock equivalent shares):
 
 March 31, 2025March 31, 2024
Warrants to purchase common stock325,330 409,108 
Common stock options608,146 928,900 
Restricted stock units1,822,547 1,781,040 
Employee stock purchase plan14,844 11,023 
Total2,770,867 3,130,071