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Note 2 - Summary of Significant Accounting Policies (Details) | 9 Months Ended
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Sep. 30, 2014
Accounting Policies [Abstract] |
Shares Prescribed Aggregation | 50,000
Period For Share Settlement | 3 days

X
- Definition Period for share settlement. + References No definition available. + Details
Name: | slv_PeriodForShareSettlement
Namespace Prefix: | slv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Prescribed aggregation at which shares are issued and redeemed. + References No definition available. + Details
Name: | slv_SharesPrescribedAggregation
Namespace Prefix: | slv_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration