Net Loss Per Share (Calculations for EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Net loss attributable to common stockholders		$ (12,288)	$ (4,809)	$ (24,362)	$ (15,220)
Basic and diluted weighted average shares outstanding (in shares)	[1]	12,772,176	12,749,456	12,757,376	12,748,674
Basic and diluted net loss per share (in dollars per share)	[1]	$ (0.96)	$ (0.38)	$ (1.91)	$ (1.19)

[1] Prior period amounts retroactively adjusted for the effects of the Reverse Stock Split (see Note 1).