Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows used in operating activities:
Net loss		$ (21,675)	$ (24,717)	$ (32,503)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation		463	642	696
Share-based compensation to employees and non employees		2,766	3,654	3,398
Deferred taxes		(107)	73	(5)
Loss on extinguishment of debt			313
Loss on inducement of debt	[1]	600
Financial expenses related to long term loan		224	128	675
Capital Gain				(8)
Changes in assets and liabilities:
Trade receivables, net		322	151	892
Prepaid expenses and other current and long term assets		734	(438)	183
Inventories		1,403	(582)	(911)
Trade payables		492	(1,613)	950
Employees and payroll accruals		(222)	(147)	(202)
Deferred revenues		283	47	(32)
Other current and long term liabilities		(57)	27	120
Net cash used in operating activities		(14,774)	(22,462)	(26,747)
Cash flows used in investing activities:
Purchase of property and equipment		(13)	(21)	(452)
Proceeds from sale of property and equipment				15
Net cash used in investing activities		(13)	(21)	(437)
Cash flows from financing activities:
Issuance of ordinary shares upon exercise of options to purchase ordinary shares by employees and non-employees			38	18
Proceeds from long term loan				20,000
Debt issuance cost				(501)
Repayment of long term loan		(3,866)	(3,102)	(922)
Issuance of ordinary shares in investment agreement, net of issuance expenses in an amount of $830	[2]	4,295
Issuance of ordinary shares in at-the-market offering, net of issuance expenses paid in the amount of $211	[2]	1,142	9,309	4,099
Issuance of ordinary shares and exercise of pre-funded warrants into ordinary shares in follow-on offering, net of issuance expenses in an amount of $1,505 and net of long term loan conversion in the amount of $3,600	[1],[2]	8,140	7,163	11,089
Net cash provided by financing activities		9,711	13,408	33,783
Increase (decrease) in cash, cash equivalents, and restricted cash		(5,076)	(9,075)	6,599
Cash, cash equivalents, and restricted cash at beginning of period		15,423	24,498	17,899
Cash, cash equivalents, and restricted cash at end of period		10,347	15,423	24,498
Supplemental disclosures of non-cash flow information
Repayment of long term loan by issuance of units and pre-funded units	[1]	3,000
At-the-market offering expenses not yet paid	[2]	25
Classification of other current assets to property and equipment, net		236
Classification of inventory to property and equipment			203	181
Supplemental disclosures of cash flow information:
Cash and cash equivalents		9,546	14,567	23,678
Restricted cash included in other long term assets		801	856	820
Total Cash, cash equivalents, and restricted cash		10,347	15,423	24,498
Cash paid for income taxes		25	21	45
Cash paid for interest		$ 1,501	$ 2,300	$ 1,301

[1] See note 6.

[2] See note 8b.