CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (18,276)	$ (26,457)	$ (83,440)
Adjustments required to reconcile net loss to net cash used in operating activities:
Share based compensation	835	514	337
Depreciation	1,617	1,671	1,920
Financial expenses (income), net (mainly exchange differences)	378	20	(40)
Changes in accrued liability for employee rights upon retirement	(10)	(18)	(18)
Gain on amounts funded in respect of employee rights upon retirement	(58)	(46)	(21)
Loss on sale of fixed assets			6
Loss on extinguishment of convertible notes	0	0	1,325
Net loss (income) in connection with conversion of convertible notes		213	(116)
Change in fair value of convertible notes embedded derivative	0	0	38,061
Amortization of debt issuance costs and debt discount	2,991	2,602	2,334
Issuance of shares for interest payment in connection with conversions of convertible notes	0	234	2,391
Changes in operating assets and liabilities:
Increase (decrease) in contracts liability (including non-current portion)	(9,580)	17,880	24,178
Decrease (increase) in accounts receivable and other assets	188	(3,099)	25
Changes in right of use assets	(110)
Decrease (increase) in inventories	414	(736)	(2,588)
Increase (decrease) in accounts payable and accruals	2,735	(761)	4,902
Increase (decrease) in other long term liabilities	(482)	241	750
Net cash used in operating activities	(19,358)	(7,742)	(9,994)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(627)	(686)	(971)
Proceeds from sale of property and equipment			3
Decrease (increase) in restricted deposit	(259)	62	(146)
Amounts funded in respect of employee rights upon retirement, net	3	33	(5)
Net cash used in investing activities	(883)	(591)	(1,119)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net payment for convertible notes	0	(4,752)	(10,961)
Net proceeds from issuance of convertible notes			9,542
Net cash used in financing activities	0	(4,752)	(1,419)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	225	(270)	414
NET DECREASE IN CASH AND CASH EQUIVALENTS	(20,016)	(13,355)	(12,118)
BALANCE OF CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	37,808	51,163	63,281
BALANCE OF CASH AND CASH EQUIVALENTS AT END OF YEAR	17,792	37,808	51,163
SUPPLEMENTARY INFORMATION ON INVESTING AND FINANCING ACTIVITIES NOT INVOLVING CASH FLOWS:
Purchase of property and equipment	98	225	526
Convertible note conversions	0	2,285	16,263
Right of use assets obtained in exchange for new operating lease liabilities	388
SUPPLEMENTARY DISCLOSURE ON CASH FLOWS
Interest paid	$ 4,344	$ 4,585	$ 4,854