Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Income (Loss) Attributable to Parent [Abstract]
Net loss	$ (6,577)	$ (8,963)	$ (7,091)	$ (4,931)	$ (3,786)	$ (3,289)	$ (22,631)	$ (12,006)
Basic weighted-average common shares outstanding (in shares)	47,182			46,669			47,096	46,355
Diluted weighted-average common shares outstanding (in shares)	47,182			46,669			47,096	46,355
Basic loss per common share (in USD per share)	$ (0.14)			$ (0.11)			$ (0.48)	$ (0.26)
Diluted loss per common share (in USD per share)	$ (0.14)			$ (0.11)			$ (0.48)	$ (0.26)
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)	6,536			5,852			6,536	5,852
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)	633			412			633	412