Income Tax (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Non-refundable tax credits	$ 1,981	$ 1,553
Expiring in 2026 [Member]
Non-refundable tax credits	8
Expiring in 2027 [Member]
Non-refundable tax credits	9
Expiring in 2028 [Member]
Non-refundable tax credits	165
Expiring in 2029 [Member]
Non-refundable tax credits	145
Expiring in 2030 [Member]
Non-refundable tax credits	124
Expiring in 2031 [Member]
Non-refundable tax credits	131
Expiring in 2032 [Member]
Non-refundable tax credits	164
Expiring in 2033 [Member]
Non-refundable tax credits	109
Expiring in 2034 [Member]
Non-refundable tax credits	83
Expiring in 2035 [Member]
Non-refundable tax credits	97
Expiring in 2036 [Member]
Non-refundable tax credits	135
Expiring in 2037 [Member]
Non-refundable tax credits	257
Expiring in 2038 [Member]
Non-refundable tax credits	554
Undeducted research and development expenses with no expiration date [Member]
Non-refundable tax credits	10,663	7,532
Canadian federal [Member]
Operating Loss Carryforwards	14,934	9,560
Provincial [Member]
Operating Loss Carryforwards	$ 16,498	$ 10,052