Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents		$ 7,798	$ 12,004
Short-term bank deposits		22,053	22,036
Accounts receivable:
Trade, net		1,113	1,224
Other		91	165
Prepaid expenses		291	522
Inventory		1,286	1,143
TOTAL CURRENT ASSETS		32,632	37,094
NON-CURRENT ASSETS:
Property, plant and equipment, net		628	632
Operating lease right of use assets		996	1,081
Fund in respect of employee rights upon retirement		915	905
TOTAL NON-CURRENT ASSETS		2,539	2,618
TOTAL ASSETS		35,171	39,712
Accounts payable and accruals:
Trade		900	893
Other		2,791	3,454
TOTAL CURRENT LIABILITIES		3,691	4,347
LONG-TERM LIABILITIES-
Operating lease liabilities		678	781
Liability for employees rights upon retirement		1,098	1,052
TOTAL LONG-TERM LIABILITIES		1,776	1,833
COMMITMENTS AND CONTINGENT LIABILITIES (Note 8)
TOTAL LIABILITIES		5,467	6,180
EQUITY:
Common stock, par value $0.0001 per share; 150,000,000 shares authorized at March 31, 2022 and December 31, 2021; 8,317,876 and 8,296,256 shares issued and outstanding at March 31, 2022 and December 2021, respectively		1	1
Additional paid-in capital		217,278	216,625
Accumulated deficit		(187,575)	(183,094)
Total equity		29,704	33,532
Total liabilities and equity		35,171	39,712
Series C Preferred Stock [Member]
EQUITY:
Preferred C shares, par value $0.0001 per share; 1,172,000 shares authorized at March 31, 2022 and December 31, 2021; 1,718 shares issued and outstanding at March 31, 2022 and December 31 2021, respectively	[1]

[1] Represents an amount less than $1 thousand