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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

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
						Year Ended December 31,
						2022						2021
Medicare						39		%				19		%
Medicare Advantage						15		%				13		%
Blue Shield						*						12		%

* Less than 10%.

						Accounts Receivable
						December 31,
						2022						2021
Medicare						21		%				*
Medicare Advantage						13		%				*
Blue Shield						*						19		%
United Healthcare						*						18		%

* Less than 10%.

Disaggregation of Revenue

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

						Year Ended December 31,
						2022						2021
Revenue:
Commercial						$	18,975					$	27,499
Government						17,687						9,221
Client(1)						7,928						9,288
Other(2)						973						1,091
Janssen (SIMPONI®)						—						1,200
Total revenue						$	45,563					$	48,299

(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,
						2022						2021
Cash and cash equivalents						$	62,391					$	99,442
Restricted cash						200						100
						$	62,591					$	99,542

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,
						2022						2021
Cash and cash equivalents						$	62,391					$	99,442
Restricted cash						200						100
						$	62,591					$	99,542

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,
						2022						2021
Warrants to purchase common stock						409,108						409,108
Common stock options						1,421,235						2,014,330
Restricted stock units						1,036,208						415,325
Employee stock purchase plan						58,711						20,193
Total						2,925,262						2,858,956

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