Net Loss 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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss used in calculating net loss per share, basic	$ (44,274)	$ (12,134)	$ (105,600)	$ (74,552)
Denominator:
Weighted average shares of common stock outstanding used in computing net loss per share, basic (in shares)	19,932	19,593	19,858	18,897
Dilutive effect of incremental shares and share equivalents:
Weighted average shares of common stock outstanding used in computing net loss per share, diluted (in shares)	19,932	19,593	19,858	18,897
Net loss per share:
Net loss per share, basic (in USD per share)	$ (2.22)	$ (0.62)	$ (5.32)	$ (3.95)
Net loss per share, diluted (in USD per share)	$ (2.22)	$ (0.62)	$ (5.32)	$ (3.95)
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	0
RSUs
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	0
PSUs
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	0
ESPP
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0	0	0