The Company’s basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding for the period. For purposes of the calculation of diluted net loss per share options to purchase common stock, restricted stock units, unvested shares of common stock issued upon the early exercise of stock options, convertible preferred stock and warrants to purchase common stock and convertible preferred stock are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share as their effect is antidilutive. Because the Company has reported a net loss for the years ended December 31, 2018, 2017 and 2016, diluted net loss per common share is the same as the basic net loss per share for those years.

The table presents the calculation of basic and diluted net loss per share as follows (in thousands, except per share data):

	Years Ended December 31,
	2018			2017			2016
Numerator:
Net loss allocable to common stockholders	$	(8,857	)	$	(63,509	)	$	(42,758	)
Denominator:
Weighted-average shares used in computing net loss per share, basic and diluted		104,618			28,308			4,746
Net loss per share, basic and diluted	$	(0.08	)	$	(2.24	)	$	(9.01	)

The potential common shares that were excluded from the calculation of diluted net loss per share because their effect would have been antidilutive for the periods presented are as follows (in thousands):

	Years Ended December 31,
	2018		2017		2016
Equity awards to purchase common stock		20,057		26,608		22,335
Unvested shares of common stock issued upon early exercise of stock options and business acquisition		70		57		3
Warrants to purchase common stock		—		184		375
Warrants to purchase convertible preferred stock		—		—		1,817
Convertible preferred stock		—		—		80,844
Total		20,127		26,849		105,374