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Note 5 - Term deposit (Detail) | Mar. 31, 2013
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Time Deposits, Weighted Average Interest Rate, Maturities Year One | 3.50%

X
- Definition Weighted average interest rate for time deposits held by the entity with maturities of one year or less. + References No definition available. + Details
Name: | us-gaap_TimeDepositsWeightedAverageInterestRateMaturitiesYearOne
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant