Note 11 - Other Income (Expense) - Summary of Other Income (Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Interest income	$ 1,172	$ 947	$ 740
Interest expense	(5,228)	(4,551)	(5,188)
Foreign exchange gain (loss)	(531)	182	4,771
Write-down of investments			(426)
	$ (4,587)	$ (3,422)	$ (103)