| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block] |
| SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisable |
| StockCompensation |
| Disclosure of the following for fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position: the number, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term of options (or share units) currently exercisable (or convertible). |
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| [Level 3 Text Block] |
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| us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableTableTextBlock |
| http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsStockCompensation |