Net Income (Loss) Per Share - Reconciliation of Basic and Diluted Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ (5,896)	$ (3,279)	$ (23,225)	$ (115)	$ (156)	$ (8,771)	$ (32,400)	$ (9,042)
Weighted average number of shares outstanding:
Basic (in shares)	27,201			21,592			26,484	21,532
Effect of dilutive securities:
Diluted (in shares)	27,201			21,592			26,484	21,532
Net income (loss) per share:
Basic (in dollar per share)	$ (0.22)			$ (0.01)			$ (1.22)	$ (0.42)
Diluted (in dollar per share)	$ (0.22)			$ (0.01)			$ (1.22)	$ (0.42)