Note 7 - Non-controlling Interest (Details)	Jun. 30, 2012
Ownership percentage of Shamrock Oil & Gas, Ltd.	60.00%
Non-controlling interest in Shamrock	40.00%

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant