Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Equity (Details Textual)

v3.8.0.1
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
Dec. 31, 2015
Dec. 03, 2015
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        
NIS [Member] | 2013 Plan [Member]                    
Statement Line Items [Line Items]                    
Ordinary shares par value           $ 0.25        
Series 7 [Member]                    
Statement Line Items [Line Items]                    
Registered warrants         9,907,500          
Warrants were exercisable into ordinary shares         396,300          
Series 7 [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Financial income         $ 119          
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      
Series 10 [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Warrants exercise price             $ 9.85      
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      
Series 11 [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Warrants exercise price             $ 9.80      
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      
Series 12 [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Warrants exercise price             $ 15.29      
Ordinary Shares [Member]                    
Statement Line Items [Line Items]                    
Ordinary shares par value               $ 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
ADS [Member]                    
Statement Line Items [Line Items]                    
Ordinary shares 138,890           138,890      
Additional ordinary shares 69,445                  
Warrants term   five and a half years                
Warrants exercise price   $ 2.25                
ADS [Member] | Placement Agent Warrants [Member]                    
Statement Line Items [Line Items]                    
Ordinary shares   250,000                
Warrants to purchase shares issued   125,000                
Warrants exercise price   $ 2.25                
ADS [Member] | Placement Agent Warrants [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Cash issuance costs   $ 2,299                
September 2015 Financing [Member]                    
Statement Line Items [Line Items]                    
Warrants to purchase shares issued               2,275,863    
Cash issuance costs               $ 3,060    
September 2015 Financing [Member] | ADS [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      
Warrants term               Five years    
September 2015 Financing [Member] | ADS [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Fair value of warrants issued             $ 2,027 $ 4,430 $ 6,370  
September 2015 Financing [Member] | Placement Agent Warrants [Member] | ADS [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             $ 1,224      
September 2015 Financing [Member] | Direct Offering [Member] | ADS [Member]                    
Statement Line Items [Line Items]                    
Ordinary shares       2,068,966            
Additional ordinary shares       2,068,966            
Gross proceeds       $ 34,767            
Issued unregistered warrants to purchase       1,034,483            
Ordinary shares issued       4,137,932            
October 2015 Financing [Member]                    
Statement Line Items [Line Items]                    
Warrants to purchase shares issued             998,276      
October 2015 Financing [Member] | ADS [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      
Warrants term               Half years    
October 2015 Financing [Member] | ADS [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Fair value of warrants issued             $ 873 $ 1,914 2,746  
October 2015 Financing [Member] | Placement Agent Warrants [Member] | ADS [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             $ 554      
October 2015 Financing [Member] | Direct Offering [Member] | ADS [Member]                    
Statement Line Items [Line Items]                    
Ordinary shares     1,109,196              
Additional ordinary shares     887,356              
Gross proceeds     $ 18,653              
Issued unregistered warrants to purchase     443,678              
Ordinary shares issued     2,218,392              
January 2017 Financing [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Subject to certain adjustments, for a period 4007                  
Fair value of warrants issued   7,117                
Additional issuance costs   $ 712                
January 2017 Financing [Member] | Private Placement and Accredited Investors [Member] | ADS [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                
January 2017 Financing [Member] | Private Placement and Accredited Investors [Member] | ADS [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Aggregate purchase price   $ 18,935                
March 2014 Financing [Member] | ADS [Member]                    
Statement Line Items [Line Items]                    
Warrants term             Four years      
March 2014 Financing [Member] | ADS [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Fair value of warrants issued             $ 0 126 2,163  
December 2014 Financing [Member] | ADS [Member] | NIS [Member]                    
Statement Line Items [Line Items]                    
Fair value of warrants issued             $ 130 $ 3,597 $ 5,446