Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Property and Equipment, Net

All property and equipment is depreciated on a straight-line basis over the estimated useful lives of the assets, which are as follows:

Computer and office equipment	3 – 5 years
Machinery and equipment	3 – 5 years
Furniture and fixtures	7 years

Property and Equipment, net:

	December 31, 2019			December 31, 2018
	(in thousands)
Machinery and equipment	$	4,613		$	3,785
Construction in progress	1,854			730
Computer and office equipment	598			407
Leasehold improvements	497			448
Furniture and fixtures	187			148
	7,749			5,518
Less: Accumulated depreciation and amortization	(3,795		)	(3,364		)
	$	3,954		$	2,154

Schedule of Accrued Liabilities and Other

Accrued Liabilities and Other:

	December 31, 2019		December 31, 2018
	(in thousands)
Accrued compensation and related expenses	$	7,274	$	5,425
Accrued litigation expense	3,200		—
Accrued professional services	392		583
Sales tax payable	370		388
Liability for early exercise of unvested stock options	97		331
Others	272		133
	$	11,605	$	6,860