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Net Loss per Common Share (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2018

Dec. 31, 2017

Earnings Per Share [Abstract]

Calculation of net loss and number of shares used to compute basic and diluted earnings per share

Basic net loss per share is determined by dividing net loss by the weighted average shares of common stock outstanding during the period, without consideration of potentially dilutive securities. Diluted net loss per share is determined by dividing net loss by diluted weighted average shares outstanding. Diluted weighted average shares reflects the dilutive effect, if any, of potentially dilutive common shares, such as stock options and warrants calculated using the treasury stock method. In periods with reported net operating losses, all common stock options and warrants are generally deemed anti-dilutive such that basic net loss per share and diluted net loss per share are equal. However, in certain periods in which the exercise price of the warrants was less than the last reported sales price of Delcath’s common stock on the final trading day of the period and there is a gain recorded pursuant to the change in fair value of the warrant derivative liability, the impact of gains related to the mark-to-market adjustment of the warrants outstanding at the end of the period is reversed and the treasury stock method is used to determine diluted earnings per share.

		June 30,
(in thousands, except share data)		2018				2017
Net income (loss) - basic		$	527			$	(13,276	)
Adjustment for gain on warrant income			(619	)			—
Net loss - diluted		$	(92	)		$	(13,276	)
Weighted average shares outstanding - basic			788,512				848
Weighted average shares outstanding - diluted			799,430				848
Net income (loss) per share - basic		$	0.67			$	(15,656	)
Net income (loss) per share - diluted		$	(0.12	)		$	(15,656	)

The calculation of net loss and the number of shares used to compute basic and diluted earnings per share for the years ended December 31, 2017, 2016 and 2015 are as follows:

(in thousands, except share data)		2017				2016				2015
Net loss		$	(45,117	)		$	(17,971	)		$	(14,704	)
Preferred stock dividends			(527	)			—				—
Net loss, adjusted			(45,644	)			(17,971	)			(14,704	)
Net loss per share – basic and diluted			(3,250	)			(1,853,500	)			(2,548,000	)
Weighted average shares outstanding – basic and diluted			14,039				10				6

Anti-dilutive securities excluded from the computation of earnings per share

The following potentially dilutive securities were excluded from the computation of earnings per share as of June 30, 2018 and June 30, 2017 because their effects would be anti-dilutive:

		June 30,				June 30,
		2018				2017
Stock options			—				55,846
Unvested restricted shares			—				101,294
Warrants			2,116,296				36,848
Assumed conversion of convertible notes			1,116,255				—
Total			3,232,551				193,988

Shares excluded from the computation of diluted EPS:

		2017				2016				2015
Stock options			—				—				—
Unvested restricted shares			—				—				—
Warrants			14,049				41				65
Total			14,049				41				63

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- References

No definition available.

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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