Loss Per Common Share

Basic loss per common share is calculated by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted loss per common share is calculated using the treasury share method by giving effect to all potentially dilutive securities that were outstanding. Potentially dilutive options and warrants to purchase common stock that were outstanding during the periods presented were excluded from the diluted loss per share calculation because such shares had an anti-dilutive effect due to the net loss reported in those periods. Therefore, basic and diluted loss per common share is the same for each of the three and six months ended June 30, 2019 and 2018.

The following is the computation of loss per common share for the three and six months ended June 30, 2019 and 2018:



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net loss	$	(5,220	)	$	(6,825	)	$	(10,506	)	$	(12,334	)
Weighted-average basic and diluted common shares outstanding	44,368,174			39,454,821			44,363,115			39,406,324
Loss per share - basic and diluted	$	(0.12	)	$	(0.17	)	$	(0.24	)	$	(0.31	)

The outstanding securities presented below were excluded from the calculation of net loss per common share, because such securities would have been anti-dilutive due to the Company’s net loss per share during the periods ending on the dates presented:

Options to purchase common stock

Warrants to purchase common stock