Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

v3.19.2
Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Feb. 14, 2017
Jun. 30, 2019
Jun. 30, 2018
Mar. 27, 2019
Mar. 19, 2019
Feb. 15, 2019
Jan. 15, 2019
Dec. 31, 2018
Apr. 29, 2018
Apr. 23, 2018
Apr. 04, 2018
Jan. 19, 2018
Stockholders' Equity (Textual)                        
Sale of stock price per share   $ 2.00   $ 1.46 $ 1.85 $ 2.00 $ 2.00 $ 1.85 $ 1.24 $ 1.38 $ 1.25 $ 2.111
Aggregate gross proceeds received   $ 1,850 $ 1,449                  
Beneficial ownership, percentage   10.00%                    
Common Stock [Member]                        
Stockholders' Equity (Textual)                        
Aggregate gross proceeds received   $ 2,312 $ 1,472                  
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.