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The Company and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Schedule of outstanding warrants to purchase of common stock

As of September 30, 2019 and December 31, 2018, the Company had the following outstanding warrants to purchase common stock:

Warrant type		Number of shares				Exercise Price				Expiration date
Pre-funded common stock			115,538			$	0.02			None
Common stock			33,125			$	47.00			January 2023
Common stock			1,845,540			$	6.00			October 2023

Summary of Computation of Basic and Diluted Net Loss Per Share

The following table sets forth the computation of basic and diluted net loss per share for the periods indicated (in thousands, except per share amounts):

		Three months ended								Nine months ended
		September 30,								September 30,
		2019				2018				2019				2018
Numerator:
Net loss		$	(1,801	)		$	(2,812	)		$	(1,894	)		$	(2,149	)
Denominator:
Weighted-average common shares outstanding			2,171				412				2,161				409
Total shares: basic and diluted			2,171				412				2,161				409
Net loss per share:
Basic and diluted		$	(0.83	)		$	(6.83	)		$	(0.88	)		$	(5.25	)

Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share

The following table sets forth securities outstanding which were excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive (in thousands):

		September 30,
		2019				2018
Options to purchase common stock			81				17
Unvested restricted common stock units			91				19
Convertible debt			245				118
Warrants			1,994				33
Total			2,411				187

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Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

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Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

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Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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