Nature of Operations, Basis of Presentation and Significant Accounting Policies - Schedule of Computation of Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ 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
Net loss	$ (906)	$ (1,838)	$ (2,780)	$ (2,558)	$ (2,744)	$ (5,338)
Preferred stock dividends	(382)		(357)		(765)	(739)
Net Loss Applicable to Common Stockholders	$ (1,288)		$ (3,137)		$ (3,509)	$ (6,077)
Denominator
Weighted average common shares outstanding used to compute net loss per share, basic and diluted (in shares)	10,869,530		10,860,049		10,869,530	10,811,138
Net loss per share of common stock, basic and diluted
Net loss per share (in dollar per share)	$ (0.12)		$ (0.29)		$ (0.32)	$ (0.56)