Net Loss Per Share - Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss used in calculating net income (loss) per share, basic	$ (15,142)	$ (359)
Net loss used in calculating net income (loss) per share, diluted	$ (15,142)	$ (359)
Denominator:
Weighted average shares of common stock outstanding used in computing net loss per share, basic (in shares)	18,080	17,768
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)	18,080	17,768
Net loss per share:
Net loss per share, basic (USD per share)	$ (0.84)	$ (0.02)
Net loss per share, diluted (USD per share)	$ (0.84)	$ (0.02)
Options
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0
RSUs
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0
PSUs
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0
ESPP
Dilutive effect of incremental shares and share equivalents:
Dilutive effect of share-based payment arrangements (in shares)	0	0