Net loss per share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Net Income per Share, Basic and Diluted

The following table presents the calculations of basic and diluted net loss per share:

	Year ended December 31,
(in thousands, except per share data)	2020		2019		2018
Numerator:
Net loss	$	(66,783)	$	(14,642)	$	(109,034)
Denominator:
Weighted-average common shares - basic and diluted for Class A and Class B common stock	149,037		144,891		139,495
Basic and diluted net loss per share	$	(0.45)	$	(0.10)	$	(0.78)

Schedule of Antidilutive Securities Excluded from Computation of Net Income per Share

The following potentially dilutive shares were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:

	Year ended December 31,
(in thousands)	2020	2019	2018
Anti-dilutive stock-based awards	15,856	13,527	15,834