Employee benefit plans (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

schedule of share-based compensation, Performance Stock Units Award Activity [Table Text Block]

A summary of the Company’s PSU activity for the three months ended March 31, 2020 is as follows:

	Shares (in thousands)		Weighted-average grant date fair value
Non-vested shares at December 31, 2019	788		$	7.51
Granted	1,035		4.08
Vested	(144	)	7.51
Forfeited	(363	)	7.51
Non-vested shares at March 31, 2020	1,316		$	4.81

Schedule of Share-based Compensation, Stock Options, Activity

A summary of the Company’s stock option activity for the three months ended March 31, 2020 is as follows:

	Shares (in thousands)		Weighted-average exercise price		Weighted-average remaining contractual term (in years)	Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2019	3,963		$	10.16	6.35	$	374
Granted	631		4.08
Exercised	(7	)	0.94
Forfeited/Cancelled	(320	)	10.46
Outstanding at March 31, 2020	4,267		$	9.25	6.48	$	157
Vested and expected to vest at March 31, 2020	4,267		$	9.25	6.48	$	157
Exercisable at March 31, 2020	2,934		$	11.01	5.25	$	157

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of the Company’s RSU activity for the three months ended March 31, 2020 is as follows:

	Shares (in thousands)		Weighted-average grant date fair value
Non-vested shares at December 31, 2019	8,225		$	6.11
Granted	4,231		4.08
Vested	(1,328	)	6.63
Forfeited	(377	)	6.32
Non-vested shares at March 31, 2020	10,751		$	5.24

Allocation of Stock-based Compensation Expense

The following table summarizes stock-based compensation expense included in the condensed consolidated statements of operations:

	Three months ended March 31,
(in thousands)	2020		2019
Cost of revenue	$	503	$	513
Research and development	3,022		4,677
Sales and marketing	1,717		2,213
General and administrative	2,395		2,382
Total stock-based compensation expense	$	7,637	$	9,785