Commitments and Contingencies - contingencies (Details) - Shareholder class action lawsuits - item |
2 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2014 |
Aug. 31, 2013 |
Aug. 19, 2013 |
May. 22, 2013 |
May. 07, 2013 |
May. 10, 2013 |
Apr. 23, 2013 |
Dec. 31, 2015 |
|
| Commitments and contingencies | ||||||||
| Number of purported securities fraud class action complaints filed | 5 | |||||||
| Number of District Court actions alleged from July 23, 2010 to March 4, 2013 | 3 | |||||||
| Number of District Court actions alleged from August 8, 2012 to February 28, 2013 | 2 | |||||||
| Number of investors filed motion | 3 | 6 | ||||||
| Number of action complaints filed ordered to consolidate | 5 | |||||||
| Number of plaintiff applicants directed to file supplemental submissions | 2 | |||||||
| Extension term | 30 days | |||||||
| Number of notices of actions relating to Canadian securities class action claims | 3 | |||||||
| Number of actions were succeeded by specific action with an amended claim | 3 | |||||||
| Number of actions by which specific Ontario actions were succeeded | 1 | |||||||