Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property and equipment

The estimated useful lives of property and equipment are as follows:

Computer equipment	2-3 years
Software	3 years
Machinery & production equipment	5-10 years
Furniture & fixtures	3-5 years
Leasehold improvements	Shorter of lease term or useful life

Property and equipment, net, consisted of:

	December 31,
	2019		2018
Computer equipment and software	$	1,112	$	833
Furniture and fixtures	366		389
Machinery and equipment	3,142		2,723
Leasehold improvements	609		609
Construction in process	70		481
	5,299		5,035
Less: accumulated depreciation	(2,247)		(1,151)
	$	3,052	$	3,884

Schedule of antidilutive shares excluded from earnings per share

Diluted net loss per common share for the periods presented do not reflect the following potential common shares, as the effect would be antidilutive:

	Year Ended December 31,
	2019	2018
Stock options	7,399,217	6,182,873
Common stock warrants	2,677,188	1,866,831
Employee stock purchase plan	—	31,892
Total	10,076,405	8,081,596