Note 2 - Summary of Significant Accounting Policies (Details)	Mar. 31, 2015
Accounting Policies [Abstract]
Shares Prescribed Aggregation	50,000iau_SharesPrescribedAggregation

Prescribed aggregation at which shares are issued and redeemed.

No definition available.

Name:	iau_SharesPrescribedAggregation
Namespace Prefix:	iau_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant