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Condensed Statements of Cash Flows (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2011
INCREASE / (DECREASE) IN CASH FROM OPERATIONS:    
Cash proceeds received from transfer of Bullion $ 0 $ 0
Cash expenses paid 0 0
Increase in cash resulting from operations 0 0
Cash and cash equivalents at beginning of period 0 0
Cash and cash equivalents at end of period 0 0
SUPPLEMENTAL DISCLOSURE OF NON-CASH FINANCING ACTIVITIES:    
Value of Bullion received for creation of Shares 50,640,859 104,271,834
Value of Bullion distributed for redemption of Shares - at average cost 34,410,768 42,627,019
RECONCILIATION OF NET GAIN TO NET CASH PROVIDED BY OPERATING ACTIVITIES:    
Net gain from operations 4,691,816 4,861,386
Adjustments to reconcile net gain to net cash provided by operating activities:    
(Increase) in Bullion assets (15,672,491) (60,853,851)
Decrease in Bullion receivable 4,813,115 4,378,396
Increase in amounts payable to Sponsor 1,422 36,568
Increase / (decrease) in redeemable Shares:    
Creations 45,827,741 99,893,433
Redemptions (39,661,603) (48,315,932)
Net cash provided by operating activities 0 0
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES:    
Value of Bullion transferred to pay expenses $ 357,721 $ 602,923