Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Significant Accounting Policies [Abstract]

Summary of Activity Related to Warranty Liability Included in Other Current Liabilities

	Twelve Months Ended
	December 31,
	2019		2018
Beginning balance	$	423	$	468
Warranty accruals and adjustments		58		132
Warranty claims		(181)		(177)
Ending balance	$	300	$	423

Schedule of Potentially Dilutive Common Stock Equivalents

	Twelve Months Ended
	December 31,
	2019	2018
Options	5,404,985	4,678,420
Warrants	19,295,773	9,055,773
Convertible preferred stock	7,545,333	7,545,333
Total potentially dilutive common stock equivalents	32,246,091	21,279,526

Reconciliation of the Level 3 Warrant Liability Measured and Recorded at Fair Value on a Recurring Basis

	Estimated Fair Value
Balance as of January 1, 2019	$	1,497
Fair value of warrants issuance during period		-
Change in fair value of warrant liability, net		(1,474)
Balance as of December 31, 2019	$	23

Impact of Adoption of ASC 842 on Balance Sheet

	December 31, 2018		Adjustments Due to the Adoption of ASC 842		January 1, 2019
Right of Use Assets (1)
Operating lease - right of use asset	$	—	$	4,267	$	4,267
Operating lease liabilities
Current	$	—	$	964	$	964
Noncurrent	$	—	$	3,432	$	3,432

(1) Operating lease right-of-use assets includes deferred rent of $129 thousand