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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2020

Stockholders Equity Note [Abstract]

Summary of Stock Option Activity

The following is a summary of stock option activity under the Plan for the three months ended March 31, 2020:  

		Number of Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2019			1,640			$	196.70			9.1		$	—
Granted			—
Exercised			—
Cancelled/Forfeited			—
Outstanding at March 31, 2020			1,640			$	196.70			8.9		$	—
Exercisable at March 31, 2020			1,640			$	196.70			8.9		$	—

Summary of Recognized Share-based Compensation Cost

		Three months ended March 31,
(in thousands)		2020				2019
Selling, general and administrative		$	49			$	43
Research and development			5				11
Total		$	54			$	54

Summary of Warrant Activity

The following is a summary of warrant activity for the three months ended March 31, 2020:

		Warrants				Exercise Price per Share		Weighted Average Exercise Price				Weighted Average Remaining Life (Years)
Outstanding at December 31, 2019			1,826,608			$7.00 - $23.04		$	23.04				5.0
Issued			—
Exercised			—
Expired			(9	)
Outstanding at March 31, 2020			1,826,599			$7.00 - $23.04		$	23.04				4.7

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the change in stock options.

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- Definition

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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