Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income (Loss) Attributable to Parent [Abstract]
Net loss	$ (8,963)	$ (7,091)	$ (3,786)	$ (3,289)	$ (16,054)	$ (7,075)
Basic weighted-average common shares outstanding (in shares)	47,117		46,403		47,052	46,195
Diluted weighted-average common shares outstanding (in shares)	47,117		46,403		47,052	46,195
Basic loss per common share (in USD per share)	$ (0.19)		$ (0.08)		$ (0.34)	$ (0.15)
Diluted loss per common share (in USD per share)	$ (0.19)		$ (0.08)		$ (0.34)	$ (0.15)
Stock options
Anti-dilutive shares excluded from diluted net loss per common share:
Anti-dilutive shares excluded from diluted net loss per common share (in shares)	6,586		5,960		6,586	5,960
Restricted stock units
Net Income (Loss) Attributable to Parent [Abstract]
Effect of dilutive stock options and restricted stock units	0		0		0	0
Anti-dilutive shares excluded from diluted net loss per common share:
Anti-dilutive shares excluded from diluted net loss per common share (in shares)	636		413		636	413