Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

v3.19.1
Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Feb. 14, 2017
Mar. 31, 2019
Mar. 31, 2018
Mar. 27, 2019
Mar. 19, 2019
Feb. 15, 2019
Dec. 31, 2018
Dec. 31, 2017
Stockholders' Equity (Textual)                
Sale of stock price per share   $ 2.00   $ 1.46 $ 1.85 $ 2.00 $ 1.85 $ 2.111
Proceeds from issuance of private placement and public offering   $ 2,312 $ 296          
Beneficial ownership, percentage   10.00%            
Series A Preferred Stock [Member]                
Stockholders' Equity (Textual)                
Series A preferred stock purchase right, description Each Right entitles the registered holder, upon the occurrence of certain events specified in the Rights Agreement, to purchase from the Company one one-thousandth of a share of the Company's Series A Preferred Stock at a price of $7.00, subject to certain adjustments.