XML 45 R21.htm IDEA: XBRL DOCUMENT v3.3.0.814
Organization - Additional Information (Detail)
12 Months Ended
Sep. 30, 2015
shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Formation date November 12, 2004
Minimum denomination of shares issued redeemed against gold 100,000
Trust adoption of financial presentation provisions appropriate to investment company for accounting purposes, effective date Oct. 01, 2014