Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Property and Equipment, Net

Property and equipment consisted of the following (in thousands): 

	September 30, 2019			December 31, 2018
Prototype	$	12,512		$	12,425
Machinery and equipment		15,588			12,654
Leasehold improvements		5,055			4,600
Furniture and fixtures		998			636
Software		1,389			1,250
Construction in progress		8,806			148
Property and equipment, gross		44,348			31,713
Less: accumulated depreciation and amortization		(20,911	)		(17,755	)
Property and equipment, net	$	23,437		$	13,958

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	September 30, 2019		December 31, 2018
Accrued payroll and related benefits	$	7,094	$	5,047
Accrued accounts payable		2,683		3,626
Payroll withholding tax, sales and other tax payable		3,378		782
Accrued legal, accounting and professional fees		375		360
Product upgrade reserve		3,794		—
Other		1,511		168
Total accrued liabilities	$	18,835	$	9,983

Schedule of Deferred Revenue

Deferred revenue consisted of the following (in thousands):

	September 30, 2019			December 31, 2018
Deferred revenue:
Product	$	3,654		$	9,623
Service		7,991			6,981
Distribution rights		2,515			2,871
Total deferred revenue		14,160			19,475
Less: current portion of deferred revenue		(9,644	)		(13,731	)
Noncurrent portion of deferred revenue	$	4,516		$	5,744

Schedule of Other Long Term Liabilities

Other Long-Term Liabilities

	September 30, 2019		December 31, 2018
Accrued interest, noncurrent portion	$	347	$	—
Deferred rent, noncurrent portion		—		628
Other		215		192
Total other-long term liabilities	$	562	$	820