Common Stock Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Jul. 15, 2014	May 12, 2014
Post-Reverse-Split Basis [Member]
Class of Warrant or Right [Line Items]
Warrant, shares	191,569
Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Preferred stock, share issued	0	0
Common Stock [Member]
Class of Warrant or Right [Line Items]
Warrants issued	1,152,125
Warrant Exercise Period	5 years
Common Stock [Member] | Post-Reverse-Split Basis [Member]
Class of Warrant or Right [Line Items]
Warrants issued	209,477
Exercise price of warrant	$ 10.18
Private Placement [Member] | Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Warrants issued	2.00
Warrant, value	$ 700
Warrant, shares	28,000
Preferred stock, share issued	480,000		480,000	480,000
Private Placement [Member] | Series B Preferred Stock [Member] | Post-Reverse-Split Basis [Member]
Class of Warrant or Right [Line Items]
Warrants issued	0.364
Private Placement [Member] | Common Stock [Member]
Class of Warrant or Right [Line Items]
Warrants issued	3.25
Warrant, value	$ 700
Warrant, shares	28,000