The following table sets forth the computation of the Company’s basic and diluted net loss per share attributable to common stockholders for the periods presented:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net and comprehensive loss attributable to common stockholders	$	(5,683,616	)	$	(5,989,991	)	$	(14,176,441	)	$	(13,415,523	)
Weighted average common shares used in computing net and comprehensive loss per share attributable to common stockholders, basic and diluted		40,588,004			27,340,914			40,588,004			27,194,028
Net and comprehensive loss per share attributable to common stockholders, basic and diluted	$	(0.14	)	$	(0.22	)	$	(0.35	)	$	(0.49	)

The following weighted average common stock equivalents were excluded from the calculation of basic and diluted net and comprehensive loss per share attributable to common stockholders for the periods presented because including them would have had an anti-dilutive effect:

	Six Months Ended June 30,
	2019		2018
Options to purchase common stock		6,771,807		3,285,429
Unvested restricted stock		—		53,223
Warrants to purchase common stock		317,562		317,562