Net Loss Per Share

3 Months Ended

Mar. 31, 2020

Basic and diluted net loss per common share is determined by dividing net loss attributable to common stockholders by the weighted-average common shares outstanding during the period. The Company has computed diluted net loss per common share after giving consideration to all potentially dilutive common shares, including options to purchase common stock, issuance of common stock under the ESPP, restricted common stock, convertible preferred stock and warrants to purchase convertible preferred stock, outstanding during the period determined using the if-converted and treasury stock methods, except where the effect of including such securities would be antidilutive. Because the Company has reported net losses since inception, these potential common shares have been anti-dilutive and therefore basic and diluted net loss per share have been equivalent.

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


	Three Months Ended March 31,
	2020	2019
Unvested common stock from early exercise of options	48,263	102,436
Stock options to purchase common stock	6,352,031	5,685,275
Common stock offering from ESPP	14,043	—
Total	6,414,337	5,787,711