Related Party Transactions (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Options granted to Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	$ 12	$ 13
Options granted to President and Chief Financial Officer [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	12	13
Options Granted To Vice-President, Research and Development [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	6	7
Options granted to Vice- President, Business and Corporate Development [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	6	7
Options Granted To Vice President, Operations [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	3	12
Options Granted To Vice-president Intellectual Property And Legal Affairs [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	17	18
Director fees [Member]
Related Party Transaction [Line Items]
Salaries, Wages and Officers' Compensation	$ 229	$ 236