Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding during the period. Diluted net income per share for the three months ended March 31, 2019 is computed by dividing net income/(loss) by the sum of the weighted average number of shares of common stock and the dilutive potential common stock equivalents then outstanding. Potential common stock equivalents consist of stock options, non-vested restricted stock, preferred shares convertible into common stock and warrants. Since there is a net loss attributable to common stockholders for the three months ended March 31, 2019, the inclusion of common stock equivalents in the computation for that period would be antidilutive.

 

		Three Months Ended March 31,
		2019				2018
Warrants			5,318,747				1,178,747
Preferred shares as convertible into common stock			837,500				61,594
Stock options			198,784				50,939
Non-vested restricted stock			9,334				28,666
Total potentially dilutive shares			6,364,365				1,319,946