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Summary of Significant Accounting Policies - (Tables)

12 Months Ended

Dec. 31, 2021

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
												Years Ended December 31,
																		2021						2020
Medicare																		19		%				20		%
Medicare Advantage																		13		%				11		%
Blue Shield																		12		%				11		%
Janssen (SIMPONI®)																		*						12		%

* Less than 10%.

												Accounts Receivable
												December 31,
												2021						2020
Blue Shield												19		%				11		%
United Healthcare												18		%				*
Janssen (SIMPONI®)												—		%				35		%

* Less than 10%.

Disaggregation of Revenue

The following table includes the Company's revenues as disaggregated by payor and customer category (in thousands):

 

												Years Ended December 31,
																		2021						2020
Revenue:
Healthcare insurers																		$	27,499					$	22,456
Government																		9,221						8,446
Client(1)																		9,288						5,109
Other(2)																		1,091						836
Janssen (SIMPONI®)																		1,200						5,128
Total revenue																		$	48,299					$	41,975

(1)Includes hospitals, other laboratories, etc.

(2)Includes patient self-pay.

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,
						2021						2020
Cash and cash equivalents												$	99,442					$	57,448
Restricted cash												100						100
												$	99,542					$	57,548

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,
						2021						2020
Cash and cash equivalents												$	99,442					$	57,448
Restricted cash												100						100
												$	99,542					$	57,548

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,
																		2021						2020
Warrants to purchase common stock																		409,108						426,827
Common stock options																		2,014,330						1,975,761
Restricted stock units																		415,325						—
Employee stock purchase plan																		20,193						11,640
Total																		2,858,956						2,414,228

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