Registration statement for securities of certain foreign private issuers

Equity (Details Textual)

v3.19.1
Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2017
Jan. 31, 2017
Oct. 31, 2015
Sep. 30, 2015
Mar. 31, 2014
Nov. 28, 2013
Dec. 31, 2017
Dec. 31, 2016
May 31, 2018
Mar. 13, 2018
Mar. 09, 2018
Dec. 03, 2015
Statement Line Items [Line Items]                        
Ordinary shares                 400,000 3,333,336    
Ordinary shares issued                     982,344  
2013 Plan [Member]                        
Statement Line Items [Line Items]                        
Description of option agreement           Under the 2013 Plan, the Company may grant its officers, directors, employees and consultants, Stock options, of the Company. Each Stock option granted shall be exercisable at such times and terms and conditions as the Board of Directors may specify in the applicable option agreement, provided that no option will be granted with a term in excess of 10 years.            
Reserved for issuance shares of common stock           1,000,000            
Series 7 [Member]                        
Statement Line Items [Line Items]                        
Registered warrants         9,907,500              
Warrants were exercisable into ordinary shares         396,300              
Recorded amount of share premium         $ 258              
Series 10 [Member]                        
Statement Line Items [Line Items]                        
Registered warrants             39,042,000          
Warrants were exercisable into ordinary shares             1,561,680          
Warrants expired date             Oct. 31, 2017          
Fair value of warrants             $ 240 $ 146        
Changes in fair value of warrants from commitment date             Dec. 31, 2017          
Series 11 [Member]                        
Statement Line Items [Line Items]                        
Registered warrants             37,372,500          
Warrants were exercisable into ordinary shares             1,494,900          
Warrants expired date             Oct. 31, 2017          
Fair value of warrants             $ 307 126        
Changes in fair value of warrants from commitment date             Dec. 31, 2017          
Series 12 [Member]                        
Statement Line Items [Line Items]                        
Registered warrants             1,470,000          
Warrants were exercisable into ordinary shares             1,470,000          
Warrants expired date             Oct. 31, 2017          
Fair value of warrants             $ 303 $ 291        
Changes in fair value of warrants from commitment date             Dec. 31, 2017          
September 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Warrants to purchase shares issued             2,275,863          
Cash issuance costs             $ 789          
October 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Warrants to purchase shares issued             998,276          
Cash issuance costs             $ 525          
ADS [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares 138,890           138,890          
Additional ordinary shares 69,445                      
ADS [Member] | Placement Agent Warrants [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares   250,000                    
Warrants to purchase shares issued   125,000                    
Fair value of warrants issued   $ 1,868                    
Cash issuance costs   621                    
Additional issuance costs   $ 188                    
Warrants exercise price   $ 2.25                    
ADS [Member] | September 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Exercisable price per share $ 5.25           $ 5.25          
Equivalent to ordinary share price per share 2.625           $ 2.625          
Fair value of warrants issued             $ 3,167          
Warrants term             five and a half years          
ADS [Member] | October 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Exercisable price per share 5.25           $ 5.25          
Equivalent to ordinary share price per share 2.625           $ 2.625          
Fair value of warrants issued             $ 147          
ADS [Member] | March 2014 Financing [Member]                        
Statement Line Items [Line Items]                        
Exercisable price per share 6.43           $ 6.43          
Equivalent to ordinary share price per share 3.215           $ 3.215          
Fair value of warrants issued             $ 1,098          
Warrants term             Four years          
ADS [Member] | December 2014 Financing [Member]                        
Statement Line Items [Line Items]                        
Exercisable price per share 4.45           $ 4.45          
Equivalent to ordinary share price per share $ 2.225           $ 2.225          
Fair value of warrants issued             $ 1,535          
Warrants term             Five years          
Placement Agent Warrants [Member] | ADS [Member] | September 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Warrants to purchase shares issued             103,448          
Ordinary shares issued 206,897           206,897          
Exercisable price per share $ 5.25           $ 5.25          
Equivalent to ordinary share price per share $ 2.625           $ 2.625          
Subject to certain adjustments, for a period             5 years          
Cash issuance costs             $ 317          
Placement Agent Warrants [Member] | ADS [Member] | October 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Warrants to purchase shares issued             55,460          
Ordinary shares issued 110,920           110,920          
Exercisable price per share $ 5.25           $ 5.25          
Equivalent to ordinary share price per share $ 2.625           $ 2.625          
Subject to certain adjustments, for a period             4 years          
Fair value of warrants issued             $ 143          
Direct Offering [Member] | ADS [Member] | September 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares       2,068,966                
Additional ordinary shares       2,068,966                
Gross proceeds       $ 9,000                
Issued unregistered warrants to purchase       1,034,483                
Ordinary shares issued       4,137,932                
Direct Offering [Member] | ADS [Member] | October 2015 Financing [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares     1,109,196                  
Additional ordinary shares     887,356                  
Gross proceeds     $ 4,825                  
Issued unregistered warrants to purchase     443,678                  
Ordinary shares issued     2,218,392                  
Certain institutional and accredited investors [Member] | ADS [Member] | January 2017 Financing [Member]                        
Statement Line Items [Line Items]                        
Sold an aggregate shares   2,500,000                    
Ordinary shares   5,000,000                    
Warrants to purchase additional shares   1,250,000                    
Additional ordinary shares   2,500,000                    
Aggregate purchase price   $ 5,000                    
Warrants term   five and a half years                    
Warrants exercise price   $ 2.25                    
NIS [Member] | 2013 Plan [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares par value           $ 0.25            
NIS [Member] | Series 10 [Member]                        
Statement Line Items [Line Items]                        
Warrants exercise price             $ 9.85          
NIS [Member] | Series 11 [Member]                        
Statement Line Items [Line Items]                        
Warrants exercise price             9.80          
NIS [Member] | Series 12 [Member]                        
Statement Line Items [Line Items]                        
Warrants exercise price             15.29          
NIS [Member] | January 2017 Financing [Member]                        
Statement Line Items [Line Items]                        
Subject to certain adjustments, for a period 1868                      
Ordinary Shares [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares par value $ 0.25           $ 0.25 $ 0.25        
Number of shares authorized 80,000,000           80,000,000 80,000,000        
Ordinary Shares [Member] | NIS [Member]                        
Statement Line Items [Line Items]                        
Ordinary shares par value                       $ 0.25
Authorized share capital                       $ 10,000
Increased authorized share capital                       $ 20,000
Number of shares authorized                       80,000,000