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Shareholders' Equity (Details 2)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
$ / shares
shares
December 14, 2016 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 1,492,670
Unit price (in NIS) $ 4.25
Gross proceeds | $ $ 1,662
April 6, 2017 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 1,358,834
Unit price (in NIS) $ 6
Gross proceeds | $ $ 2,237
May 11, 2017 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 441,483
Unit price (in NIS) $ 6
Gross proceeds | $ $ 727
May 22, 2017 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 605,000
Unit price (in NIS) $ 6
Gross proceeds | $ $ 1,001
June 13, 2017 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 1,174,286
Unit price (in NIS) $ 7
Gross proceeds | $ $ 2,280
June 3, 2018 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 7,634,536
Gross proceeds | $ $ 2,959
June 3, 2018 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 416,456
Unit price (in NIS) $ 0.3
Gross proceeds | $ $ 34
June 3, 2018 [Member] | Bottom of range [member]  
Statement Line Items [Line Items]  
Unit price (in NIS) $ 1.3
June 3, 2018 [Member] | Top of range [member]  
Statement Line Items [Line Items]  
Unit price (in NIS) $ 1.5
September 25, 2018 [Member]  
Statement Line Items [Line Items]  
Number of shares | shares 5,781,580
Unit price (in NIS) $ 0.3
Gross proceeds | $ $ 481
December 14, 2016 [Member]  
Statement Line Items [Line Items]  
Number of warrants | shares 1,492,670
Warrant exercise price $ 7.5
Expiration date Dec. 09, 2017
April 6, 2017 [Member]  
Statement Line Items [Line Items]  
Number of warrants | shares 1,358,834
Warrant exercise price $ 8.75
Expiration date Nov. 30, 2018
May 11, 2017 [Member]  
Statement Line Items [Line Items]  
Number of warrants | shares 441,483
Warrant exercise price $ 8.75
Expiration date Nov. 30, 2018
May 22, 2017 [Member]  
Statement Line Items [Line Items]  
Number of warrants | shares 605,000
Warrant exercise price $ 8.75
Expiration date Nov. 30, 2018
June 13, 2017 [Member]  
Statement Line Items [Line Items]  
Number of warrants | shares 1,174,286
Warrant exercise price $ 10
Expiration date Nov. 30, 2018
June 3, 2018 [Member]  
Statement Line Items [Line Items]  
Number of warrants | shares 4,378,693
Warrant exercise price $ 2.32
Expiration date Nov. 30, 2019
April 6, 2017 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 11,383
Exercise price $ 6
Expiration date Apr. 09, 2022
April 6, 2017 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 56,558
Exercise price $ 6
Expiration date Apr. 09, 2020
May 11, 2017 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 22,074
Exercise price $ 6
Expiration date May 11, 2020
May 22, 2017 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 45,375
Exercise price $ 6
Expiration date Jun. 21, 2020
June 13, 2017 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 84,499
Exercise price $ 10
Expiration date Jun. 21, 2020
June 3, 2018 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 414,042
Exercise price $ 2.3
Expiration date Nov. 30, 2019
June 3, 2018 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 12,893
Exercise price $ 10
Expiration date Nov. 30, 2018
August 21, 2018 [Member]  
Statement Line Items [Line Items]  
Number of non-traded warrants awarded | shares 14,900
Exercise price $ 2.4
Expiration date Nov. 30, 2019