Supplementary Financial Statement Information - Schedule of Accounts Payable and Accruals - Other (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Employees and employee institutions	$ 1,236	$ 1,238
Accrued vacation and recreation pay	278	188
Accrued expenses	886	604
Accrual for settlement payment (see note 6)	580
Current operating lease liabilities	400	362
Other	89	77
Accounts payable and accruals - other	$ 3,469	$ 2,469