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Significant Accounting Policies (Detail) - Schedule of Palladium receivable and payable (USD $)	Jun. 30, 2012	Dec. 31, 2011
Palladium receivable	$ 0	$ 0
Palladium payable	$ 11,389,069	$ 0	[1]
[1] Derived from audited Statement of Financial Condition as of December 31, 2011.

X

- Definition

Amount of palladium payable at market value as of the reporting date.

+ References

No definition available.

+ Details

Name:	pall_PalladiumPayableAtMarketValue
Namespace Prefix:	pall_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of palladium receivable at market value as of the reporting date.

+ References

No definition available.

+ Details

Name:	pall_PalladiumReceivableAtMarketValue
Namespace Prefix:	pall_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant