Basic and diluted net income (loss) per ordinary share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to ordinary shares as reported used in computing basic and diluted net income (loss) per share	$ (4,647)	$ (4,128)	$ (58,351)
Weighted average number of ordinary shares used in computing basic net income (loss) per share (in shares)	104,186,120	102,633,545	103,433,274
Potentially dilutive shares that were excluded from the computation of basic net income (loss) per share:
Weighted average number of ordinary shares used in computing diluted net income (loss) per share (in shares)	104,186,120	102,633,545	103,433,274
Weighted anti-dilutive shares outstanding which were not included in the diluted calculation (in shares)	7,874,118	9,734,269	8,524,922
Basic net income (loss) per ordinary share (in usd per share)	$ (0.04)	$ (0.04)	$ (0.56)
Diluted net income (loss) per ordinary share (in usd per share)	$ (0.04)	$ (0.04)	$ (0.56)
Options
Potentially dilutive shares that were excluded from the computation of basic net income (loss) per share:
Share-based payment arrangements (in shares)	0	0	0
Restricted share units
Potentially dilutive shares that were excluded from the computation of basic net income (loss) per share:
Share-based payment arrangements (in shares)	0	0	0
ESPP
Potentially dilutive shares that were excluded from the computation of basic net income (loss) per share:
Share-based payment arrangements (in shares)	0	0	0