Net Loss Per Share - Computation of Basic and Diluted Net Loss (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net loss used in calculating net loss per share, basic	$ (39,018)	$ (44,274)	$ (86,477)	$ (105,600)
Denominator:
Weighted average shares of common stock outstanding used in computing net loss per share, basic (in shares)	20,154	19,932	20,079	19,858
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)	20,154	19,932	20,079	19,858
Net loss per share:
Net loss per share, basic (in dollars per share)	$ (1.94)	$ (2.22)	$ (4.31)	$ (5.32)
Net loss per share, diluted (in dollars per share)	$ (1.94)	$ (2.22)	$ (4.31)	$ (5.32)
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