Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Reduction in global workforce, percent	10.00%
Severance costs		$ 1,429
Cost of revenue
Restructuring Cost and Reserve [Line Items]
Severance costs		238
Sales and marketing
Restructuring Cost and Reserve [Line Items]
Severance costs		369
Research and development
Restructuring Cost and Reserve [Line Items]
Severance costs		142
General and administrative
Restructuring Cost and Reserve [Line Items]
Severance costs		560
Other (expense) income, net
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 120