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Summary Of Significant Accounting Policies - (Tables)
12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Schedule of Concentration of Risk, by Risk Factor and Significant Payer For each significant payer, revenue as a percentage of total revenue and accounts receivable as a percentage of total accounts receivable are as follows:
 
 Revenue
 Years Ended December 31,
 20192018
Medicare25 %30 %
Blue Shield12 %14 %
United Healthcare11 %12 %
Medicare Advantage11 %10 %
Janssen (SIMPONI®)
  

*Less than 10%.

 Accounts Receivable
 December 31,
 20192018
Medicare 26 %
Blue Shield15 %16 %
United Healthcare22 %11 %
Medicare Advantage 11 %
Janssen (SIMPONI®)
19 % 

*Less than 10%.
Disaggregation of Revenue
The following table includes the Company's revenues as disaggregated by payer category (in thousands):
 
 Years Ended December 31,
 20192018
Revenue:
Healthcare insurers$23,984  $21,070  
Government9,896  10,024  
Client4,392  608  
Other(1)639  738  
Janssen (SIMPONI®)
1,476  —  
Total revenue$40,387  $32,440  
(1)Includes patient self-pay that is immaterial.
Schedule of Restricted Cash and Cash Equivalents
Cash, cash equivalents and restricted cash presented in the accompanying statements of cash flows consist of the following (in thousands):
 
 December 31,
 20192018
Cash and cash equivalents$72,084  $13,164  
Restricted cash100  100  
$72,184  $13,264  
Schedule of Cash and Cash Equivalents
Cash, cash equivalents and restricted cash presented in the accompanying statements of cash flows consist of the following (in thousands):
 
 December 31,
 20192018
Cash and cash equivalents$72,084  $13,164  
Restricted cash100  100  
$72,184  $13,264  
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):
 
 Years Ended December 31,
 20192018
Redeemable convertible preferred stock—  5,202,940  
Warrants to purchase redeemable convertible preferred stock—  224,493  
Warrants to purchase common stock461,273  934,789  
Common stock options1,375,542  661,180  
Total1,836,815  7,023,402