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				633		633
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		17,023
Issuance of ordinary shares in a "best efforts" offering, net of issuance expenses in the amount of $686		$ 52		3,632		3,684
Issuance of ordinary shares in a "best efforts" offering, net of issuance expenses in the amount of $686, shares		760,000
Issuance of ordinary shares in "best efforts" offering, net of issuance expenses in the amount of $1,056	[1]
Exercise of pre-funded warrants and warrants	[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		$ 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		1,650,248
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019		$ 102		9,864		9,966	[1]
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019, shares		1,464,665
Net loss					(8,587)	(8,587)
Balance at Jun. 30, 2019		$ 503		178,270	(161,505)	17,268
Balance, shares at Jun. 30, 2019		7,289,110
Balance at Mar. 31, 2019		$ 253		158,720	(156,918)	2,055
Balance, shares at Mar. 31, 2019		3,695,174
Share-based compensation to employees and non-employees				314		314
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		14,817
Exercise of pre-funded warrants and warrants	[2]	$ 32		1,362		1,394
Exercise of pre-funded warrants and warrants, shares	[2]	464,206
Issuance of ordinary shares in a "Registered Direct" offerings, net of issuance expenses in the amount of $1,125		$ 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		1,650,248
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019		$ 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		1,464,665
Net loss					(4,587)	(4,587)
Balance at Jun. 30, 2019		$ 503		178,270	(161,505)	17,268
Balance, shares at Jun. 30, 2019		7,289,110
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				312		312
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees			[3]
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees, shares		24,625
Issuance of ordinary shares in "best efforts" offering, net of issuance expenses in the amount of $1,056	[2]	$ 290		3,720		4,010	[1]
Issuance of ordinary shares in "best efforts" offering, net of issuance expenses in the amount of $1,056, shares	[2]	4,053,172
Exercise of pre-funded warrants	[2]	$ 199		3,293		3,492
Exercise of pre-funded warrants, shares	[2]	2,793,328
Issuance of ordinary shares in a "Warrant exercise" agreement, net of issuance expenses in the amount of $1,019	[1]
Net loss					(6,695)	(6,695)
Balance at Jun. 30, 2020		$ 993		186,070	(175,164)	11,899
Balance, shares at Jun. 30, 2020		14,190,685
Balance at Mar. 31, 2020		$ 903		184,489	(172,309)	13,083
Balance, shares at Mar. 31, 2020		12,930,155
Share-based compensation to employees and non-employees				113		113
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		14,030
Exercise of warrants	[2]	$ 90		1,468		1,558
Exercise of warrants, shaes	[2]	1,246,500
Net loss					(2,855)	(2,855)
Balance at Jun. 30, 2020		$ 993		$ 186,070	$ (175,164)	$ 11,899
Balance, shares at Jun. 30, 2020		14,190,685

[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.