Net Income (Loss) Per Common Share (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2018

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following potentially dilutive securities have been excluded from the computations of diluted weighted average shares outstanding as they would be anti-dilutive:

	March 31,
	2018		2017
Shares underlying warrants outstanding		7,099,010		7,432,342
Shares underlying options outstanding		6,474,527		5,040,306
Unvested restricted stock		753,528		584,467

The following securities have been excluded from the dilutive per share computation as they are antidilutive:

	December 31,
	2017		2016
Shares underlying options outstanding		6,770,777		4,592,347
Shares underlying warrants outstanding		7,099,010		3,291,149
Unvested restricted stock		799,387		957,336