Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss	$ (712)	$ (2,586)
Exclude gain from change in value of warrants	0	(4,400)
Net loss distributable to common stockholders – diluted	$ (712)	$ (6,986)
Shares used in computing net loss per share:
Weighted average basic shares outstanding - basic (in shares)	22,858	18,639
Effect of dilutive securities (in shares)	0	3,996
Weighted average common shares outstanding - diluted (in shares)	22,858	22,635
Loss per common share:
Loss per share of common stock — basic (in dollars per share)	$ (0.03)	$ (0.14)
Loss per share of common stock — diluted (in dollars per share)	$ (0.03)	$ (0.31)
Antidilutive shares (in shares)	200