Stockholders' Equity and Convertible Preferred Stock (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Total compensation expense	$ 214	$ 28	$ 329	$ 314
Restricted Stock [Member] | Employee And Non-Employee Restricted Stock Awards [Member]
Total compensation expense				106
Stock Option [Member] | Employee And Non-Employee [Member]
Total compensation expense		28	8	208
Warrant [Member] | Employee And Non-Employee [Member]
Total compensation expense	$ 214		$ 321