Net (Loss) Income Per Share - Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net (loss) income used in calculating net (loss) income per share, basic	$ (12,134)	$ (1,390)	$ (74,552)	$ 5,997
Denominator:
Weighted average shares of common stock outstanding used in computing net (loss) income per share, basic (in shares)	19,593	17,945	18,897	17,860
Dilutive effect of incremental shares and share equivalents:
Weighted average shares of common stock outstanding used in computing net (loss) income per share, diluted (in shares)	19,593	17,945	18,897	18,327
Net (loss) income per share:
Net (loss) income per share, basic (USD per share)	$ (0.62)	$ (0.08)	$ (3.95)	$ 0.34
Net (loss) income per share, diluted (USD per share)	$ (0.62)	$ (0.08)	$ (3.95)	$ 0.33
Convertible notes
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	0
Options
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	70
RSUs
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	297
PSUs
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	81
ESPP
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	19