Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details Textual 2)

v3.8.0.1
Fair Value of Financial Instruments (Details Textual 2)
$ in Millions, $ in Millions
1 Months Ended
Jun. 30, 2018
CAD ($)
Jun. 30, 2018
USD ($)
Nov. 30, 2017
CAD ($)
Nov. 30, 2017
USD ($)
Subsequent Event [Line Items]        
Payments to acquire convertible debt securities     $ 245.0 $ 191.3
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Payments to acquire convertible debt securities $ 200.0 $ 153.0