Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Deficit) (Details Textual)

Stockholders' Equity (Deficit) (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended				12 Months Ended
	Nov. 09, 2018	Oct. 03, 2018	Oct. 31, 2018	Oct. 22, 2018	Sep. 30, 2018	Sep. 20, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 25, 2018
Class of Warrant or Right [Line Items]
Conversion of Stock, Shares Issued			5,483,334		5,483,334
Class of Warrant or Right, Outstanding							5,963,000
Warrants Expiration Period						5 years
Convertible Preferred Stock, Shares Issued upon Conversion						5,483,334
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross							245,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights							90,000
Class of Warrant or Right, Exercise Price of Warrants or Rights							$ 7.20
Sale of Stock, Price Per Share		$ 1.44		$ 1.44
Proceeds from Warrant Exercises	$ 3,300						$ 3,268	$ 0	$ 0
Sale of Stock, Number of Shares Issued in Transaction		633,334		316,667
Class A Units [Member]
Class of Warrant or Right [Line Items]
Stock Issued During Period, Shares, New Issues						850,000
Sale of Stock, Price Per Share						$ 1.50
Class B Units [Member]
Class of Warrant or Right [Line Items]
Stock Issued During Period, Shares, New Issues						8,225
Sale of Stock, Price Per Share						$ 1,000
Common Stock [Member]
Class of Warrant or Right [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						950,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period									2,000
Stock Issued During Period, Shares, New Issues							1,815,000
Representatives Purchase Warrant [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						253,334
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 1.68
Warrant [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	5,104,850
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	2,178,484									950,000
Class of Warrant or Right, Exercise Price of Warrants or Rights										$ 0.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						950,000
Warrant [Member] \| Class B Units [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						667