Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Loss from continuing operations	$ (1,287)		$ (1,475)		$ (4,240)	$ (3,132)
Net income from discontinued operations	0		266		0	266
Net loss	(1,287)	$ (2,953)	(1,209)	$ (1,657)	(4,240)	(2,866)
Deemed dividend on Series A redeemable preferred stock	(484)		0		(968)	0
Net loss attributable to common shareholders	$ (1,771)		$ (1,209)		$ (5,208)	$ (2,866)
Denominator:
Weighted average shares outstanding - basic (in shares)	3,041		2,038		2,547	2,034
Dilutive potential common shares:	3,041		2,038		2,547	2,034
Net loss per common share - basic and diluted
Net loss per share, continuing operations (in usd per share)	$ (0.42)		$ (0.72)		$ (1.66)	$ (1.54)
Net income per share, discontinued operations (usd per share)	0		0.13		0	0.13
Net loss per share (in usd per share)	(0.42)		(0.59)		(1.66)	(1.41)
Deemed preferred stock per share (in usd per share)	(0.16)		0		(0.38)	0
Basic and diluted (in usd per share)	$ (0.58)		$ (0.59)		$ (2.04)	$ (1.41)
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