Schedule of financial assets and liabilities that are measured and recognized at fair value (Details) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015
Fair Value, Inputs, Level 1 [Member] | Warrant [Member]
Investments, Fair Value Disclosure	$ 0	$ 0
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Investments, Fair Value Disclosure	7,538	0
Fair Value, Inputs, Level 2 [Member] | Warrant [Member]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Warrant [Member]
Investments, Fair Value Disclosure	297	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Investments, Fair Value Disclosure	$ 0	$ 0