Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss from continuing operations	$ (3,883)	$ (4,241)
Net loss from discontinued operations	$ 0	$ (155)
Denominator:
Weighted-average common shares outstanding	22,488	22,610
Basic net (loss) income per common share from continuing operations (in usd per share)	$ (0.17)	$ (0.19)
Basic net income (loss) per common share from discontinued operations (in usd per share)	0.00	(0.01)
Total basic net loss per common share	(0.17)	(0.20)
Diluted (loss) income per common share from continuing operations (in usd per share)	(0.17)	(0.19)
Diluted income (loss) per common share from discontinued operations (in usd per share)	0.00	(0.01)
Total diluted (loss) income per common share (in usd per share)	$ (0.17)	$ (0.20)
Anti-dilutive securities excluded from diluted net loss per share calculation (in shares)	5,263	4,139