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, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Loss from continuing operations	$ (1,760)			$ (1,504)			$ (6,000)	$ (4,636)
Net income from discontinued operations	0			0			0	266
Net loss	(1,760)	$ (1,287)	$ (2,953)	(1,504)	$ (1,209)	$ (1,657)	(6,000)	(4,370)
Deemed dividend on Series A redeemable preferred stock	(474)			(106)			(1,442)	(106)
Net loss attributable to common shareholders	$ (2,234)			$ (1,610)			$ (7,442)	$ (4,476)
Denominator:
Weighted average shares outstanding - basic (in shares)	4,724			2,046			3,280	2,038
Dilutive potential common shares:	4,724			2,046			3,280	2,038
Net loss per common share - basic and diluted
Net loss per share, continuing operations (in usd per share)	$ (0.37)			$ (0.74)			$ (1.83)	$ (2.27)
Net income per share, discontinued operations (usd per share)	0			0			0	0.13
Net loss per share (in usd per share)	(0.37)			(0.74)			(1.83)	(2.14)
Deemed dividend on Series A redeemable preferred stock per share (in usd per share)	(0.10)			(0.05)			(0.44)	(0.05)
Basic and diluted (in usd per share)	$ (0.47)			$ (0.79)			$ (2.27)	$ (2.20)
Stock options
Denominator:
Dilutive potential common shares:	0			0			0	0
Stock warrants
Denominator:
Dilutive potential common shares:	0			0			0	0
Restricted stock units
Denominator:
Dilutive potential common shares:	0			0			0	0