Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Schedule of Concentrations of Risk Percentage

For each significant customer, revenue as a percentage of total revenue and accounts receivable, net as a percentage of total accounts receivable, net were as follows:

	Revenue				Accounts Receivable, Net
	Three Months Ended June 30,		Six Months Ended June 30,		June 30,	December 31,
	2019	2018	2019	2018	2019	2018
	(unaudited)				(unaudited)
Customer A	12.7%	25.5%	*%	26.4%	32.7%	*%
Customer B	*	11.0	*	*	*	15.1
Customer C	*	*	*	*	*	13.2
Genentech, Inc.	40.0	*	43.6	*	*	*
* less than 10%