STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Ordinary Share	Additional paid-in capital [Member]	Accumulated deficit [Member]	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			1,108		1,108
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees		$ 2			2
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees, shares		47,473
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $686	[1]	$ 52	3,632		3,684
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $686, shares	[1]	760,000
Exercise of pre-funded warrants and warrants	[1]	$ 40	1,461		1,501
Exercise of pre-funded warrants and warrants, shares	[1]	584,087
Issuance of ordinary shares in a "Registered Direct" offering, net of issuance expenses in the amount of $ 1,125	[1]	$ 115	8,010		8,125
Issuance of ordinary shares in a "Registered Direct" offering, 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		1,464,665
Net loss				(15,551)	(15,551)
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			749		749
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees		$ 3	(3)
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees, shares		63,111
Issuance of ordinary shares in a "Best Efforts" offering, net of issuance expenses in the amount of $ 1,056	[1]	$ 290	3,720		4,010
Issuance of ordinary shares in a "Best Efforts" 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]	$ 244	3,979		4,223
Exercise of pre-funded warrants and warrants, shares	[1],[2]	3,378,328
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 private placement, net of issuance expenses in the amount of $ 993	[1]	$ 429	6,578		7,007
Issuance of ordinary shares in a private placement, net of issuance expenses in the amount of $ 993, shares	[1]	5,579,776
Net loss				(12,976)	(12,976)
Balance at Dec. 31, 2020		$ 1,827	201,392	(181,445)	21,774
Balance, shares at Dec. 31, 2020		25,332,225
Share-based compensation to employees and non-employees			833		833
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees		$ 31	(31)
Issuance of ordinary shares upon vesting of RSUs by employees and non-employees, shares		398,164
Issuance of ordinary shares in a "Best Efforts" offering, net of issuance expenses in the amount of $ 1,056	[1]	$ 832	35,489		36,321
Issuance of ordinary shares in a "Best Efforts" offering, net of issuance expenses in the amount of $ 1,056, shares	[1]	10,921,502
Exercise of pre-funded warrants and warrants	[1],[2]	$ 772	14,288		15,060
Exercise of pre-funded warrants and warrants, shares	[1],[2]	10,425,258
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $ 1,019	[1]	$ 1,199	26,932		28,131
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $ 1,019, shares	[1]	15,403,014
Net loss				(12,736)	(12,736)
Balance at Dec. 31, 2021		$ 4,661	$ 278,903	$ (194,181)	$ 89,383
Balance, shares at Dec. 31, 2021		62,480,163

[1] See Note 8b.

[2] See Note 8f.