CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Cash flows used in operating activities:
Net loss		$ (12,736)		$ (12,976)	$ (15,551)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation		266		285	321
Share-based compensation to employees and non-employees		833		749	1,108
Deferred taxes		(29)		(44)	(57)
Gain on PPP forgiveness				(392)
Changes in assets and liabilities:
Trade receivables, net		99		110	(36)
Prepaid expenses, operating lease right-of-use assets and other assets		592		166	64
Inventories		432		(469)	(1,221)
Trade payables		(884)		(506)	370
Employees and payroll accruals		275		197	20
Deferred revenues		74		264	176
Operating lease liabilities and other liabilities		(391)		27	(9)
Net cash used in operating activities		(11,469)		(12,589)	(14,815)
Cash flows used in investing activities:
Purchase of property and equipment		(47)		(73)	(22)
Net cash used in investing activities		(47)		(73)	(22)
Cash flows from financing activities:
Repayment of long-term loan	[1]			(6,965)	(1,722)
Proceeds from PPP loan	[2]			392
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $686	[2]				3,684
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $1,035	[2]				8,125
Issuance of ordinary shares in a "warrant exercise" agreement, net of issuance expenses in the amount of $1,019 (1)	[2]				9,966
Issuance of ordinary shares in a "best effort" offering, net of issuance expenses in the amount of $1,056	[2]			4,010
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $977	[2]			8,023
Issuance of ordinary shares in a private placement, net of issuance expenses in the amount of $959	[2]			7,041
Issuance of ordinary shares in a private placement, net of issuance expenses paid in the amount of $3,679	[2]	36,321
Issuance of ordinary shares in a "registered direct" offering, net of issuance expenses in the amount of $3,215	[2]	28,131
Exercise of pre-funded warrants and warrants	[2],[3]	15,060		4,223	1,429
Net cash provided by financing activities		79,512	[2]	16,724	21,482
Increase in cash, cash equivalents, and restricted cash		67,996		4,062	6,645
Cash, cash equivalents, and restricted cash at beginning of period		21,054		16,992	10,347
Cash, cash equivalents, and restricted cash at end of period		89,050		21,054	16,992
Supplemental disclosures of non-cash flow information
Expenses related to offerings not yet paid	[2]			76	90
Classification of other current assets to property and equipment, net		34		98
Classification of inventory to other current assets		89			164
Classification of inventory to property and equipment		32		50	174
Cashless exercise of pre-funded warrants					72
Initial recognition of operating lease right-of-use assets					2,099
Initial recognition of operating lease liabilities					(2,249)
Supplemental disclosures of cash flow information:
Cash and cash equivalents		88,337		20,350	16,253
Restricted cash included in other long term assets		713		704	739
Total Cash, cash equivalents, and restricted cash		89,050		21,054	16,992
Supplemental disclosures of cash flow information:
Cash paid for income taxes		40		13	21
Cash paid for interest				$ 862	$ 1,499

[1] See Note 10

[2] See Note 8b.

[3] See Note 8f.