General and Administrative Expenses (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure of general and administrative expense [text block] [Abstract]

Schedule of general and administrative expenses

	Year ended December 31,
	2021		2020		2019
	U.S. dollars in thousands
Salaries and expenses relating to employees and service providers		123		164		112
Expenses relating to options and shares to employees and non-employees		37		51		5
Patents and fees		137		150		135
Directors’ fees		64		67		132
Investor relations and travel		3		4		27
Rent and office maintenance		15		42		13
Insurance		229		151		106
Professional services		381		266		262
Other		12		15		15
		1,001		910		807