CONDENSED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Ordinary Share		Additional Paid-in Capital	Accumulated deficit	Total
Balance at Dec. 31, 2018		$ 193		$ 154,670	$ (152,918)	$ 1,945
Balance, shares at Dec. 31, 2018		2,813,087
Share-based compensation to employees and non-employees				869		869
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees		$ 1				1
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees, shares		27,985
Issuance of ordinary shares in a "best efforts" offering, net of issuance expenses in the amount of $686	[1]	$ 52		3,632		3,684
Issuance of ordinary shares in a "best efforts" offering, net of issuance expenses in the amount of $686, shares	[1]	760,000
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $1,056	[1]
Exercise of pre-funded warrants and warrants	[1],[2]	$ 40		1,461		1,501
Exercise of pre-funded warrants and warrants, shares	[2]	584,087
Issuance of ordinary shares in a "Registered Direct" offerings, net of issuance expenses in the amount of $1,125	[1]	$ 115		8,010		8,125
Issuance of ordinary shares in a "Registered Direct" offerings, net of issuance expenses in the amount of $1,125, shares	[1]	1,650,248
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019	[1]	$ 102		9,864		9,966
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019, shares	[1]	1,464,665
Net loss					(11,976)	(11,976)
Balance at Sep. 30, 2019		$ 503		178,506	(164,894)	14,115
Balance, shares at Sep. 30, 2019		7,300,072
Balance at Jun. 30, 2019		$ 503		178,270	(161,505)	17,268
Balance, shares at Jun. 30, 2019		7,289,110
Share-based compensation to employees and non-employees				236		236
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees			[3]
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees, shares		10,962
Net loss					(3,389)	(3,389)
Balance at Sep. 30, 2019		$ 503		178,506	(164,894)	14,115
Balance, shares at Sep. 30, 2019		7,300,072
Balance at Dec. 31, 2019		$ 504		178,745	(168,469)	10,780
Balance, shares at Dec. 31, 2019		7,319,560
Share-based compensation to employees and non-employees				544		544
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees		$ 2		(2)
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees, shares		44,625
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $1,056	[1]	$ 290		3,720		4,010
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $1,056, shares	[1]	4,053,172
Exercise of pre-funded warrants and warrants	[1],[2]	$ 199		3,306		3,505
Exercise of pre-funded warrants and warrants, shares	[1],[2]	2,803,328
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $ 1,019	[1]	$ 357		7,624		7,981
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $ 1,019, shares	[1]	4,938,278
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019	[1]
Net loss					(10,031)	(10,031)
Balance at Sep. 30, 2020		$ 1,352		193,937	(178,500)	16,789
Balance, shares at Sep. 30, 2020		19,158,963
Balance at Jun. 30, 2020		$ 993		186,070	(175,164)	11,899
Balance, shares at Jun. 30, 2020		14,190,685
Share-based compensation to employees and non-employees				232		232
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees		$ 2		(2)
Issuance of ordinary shares upon exercise of options to purchase ordinary shares and RSUs by employees and non-employees, shares		20,000
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $ 1,019	[1]	$ 357		7,624		7,981
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $ 1,019, shares	[1]	4,938,278
Exercise of warrants	[1],[2]			13		13
Exercise of warrants, shaes	[1],[2]	10,000
Net loss					(3,336)	(3,336)
Balance at Sep. 30, 2020		$ 1,352		$ 193,937	$ (178,500)	$ 16,789
Balance, shares at Sep. 30, 2020		19,158,963

[1] See Note 8f to the condensed consolidated financial statements.

[2] See Note 8d to the condensed consolidated financial statements.

[3] Represents an amount lower than $1.