Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Customers Representing Greater than 10% of Accounts Receivable and Revenue

The Company’s customers representing greater than 10% of accounts receivable or revenue for the periods presented were as follows:

	Revenue			Accounts Receivables
	Year Ended December 31,			December 31,
Customers	2018	2017	2016	2018	2017
Customer A				23%
Customer B				22%
Customer C				19%
Customer D			23%	16%
Customer E				15%
Customer F		16%			24%
Customer G			25%
Customer H		17%
Customer I		17%
Customer J		16%
Customer K		14%			16%
Customer L		10%
Customer M					36%
Customer N			47%

Schedule of Depreciation and Amortization Periods for Property and Equipment

Depreciation and amortization periods for property and equipment are as follows:

Property and Equipment	Estimated Useful Life
Prototype	2 years
Machinery and equipment	3 – 15 years
Furniture and fixture	5 – 10 years
Software	3 years
Leasehold improvements	Lesser of estimated useful life or remaining lease term

Schedule of Revenue Disaggregated by Types and Geography

The following table presents revenue disaggregated by type and geography (in thousands):

	Years Ended December 31,
U.S.	2018		2017		2016
Product	$	32,265	$	9,529	$	—
Service		1,966		1,977		1,066
Distribution rights		—		—		40
Total U.S. revenue	$	34,231	$	11,506	$	1,106
Outside of U.S. ("OUS")
Product	$	44,361	$	20,929	$	20,555
Service		1,895		1,132		438
Distribution rights		475		475		138
Total OUS revenue	$	46,731	$	22,536	$	21,131
Total
Product	$	76,626	$	30,458	$	20,555
Service		3,861		3,109		1,504
Distribution rights		475		475		178
Total revenue	$	80,962	$	34,042	$	22,237