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Summary of Significant Accounting Policies - (Tables)

3 Months Ended

Mar. 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
						Three Months Ended March 31,
						2021						2020
Medicare						18		%				25		%
Blue Shield						12		%				12		%
Medicare Advantage						12		%				13		%
United Healthcare						*						10		%

* Less than 10%.

												Accounts Receivable
												March 31, 2021						December 31, 2020
Janssen (SIMPONI®)															25		%							35		%
Blue Shield												13		%				11		%

* Less than 10%.

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,
						2021						2020
Revenue:
Healthcare insurers						$	6,027					$	6,062
Government						2,009						2,245
Client(1)						1,965						1,082
Other(2)						286						195
Janssen (SIMPONI®)						300						—
Total revenue						$	10,587					$	9,584

(1)Includes hospitals, other laboratories, etc.

(2)Includes patient self-pay that is immaterial.

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, 2021						December 31, 2020
Cash and cash equivalents															$	118,050								$	57,448
Restricted cash												100						100
												$	118,150					$	57,548

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, 2021						December 31, 2020
Cash and cash equivalents															$	118,050								$	57,448
Restricted cash												100						100
												$	118,150					$	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):

 

						Three Months Ended March 31,
						2021						2020
Warrants to purchase common stock						426,827						436,581
Common stock options						2,041,580						1,630,014
Restricted stock units						185,000						—
Employee stock purchase plan						2,869						2,021
Total						2,656,276						2,068,616

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