Income Taxes (Details Textual) (USD $)	Dec. 31, 2012
Statutory Depletion Carry Forward Amount	$ 4,421,000

The amount of the statutory depletion carry forward, before tax effects, available to reduce future taxable income under enacted tax laws.

No definition available.

Name:	pdo_StatutoryDepletionCarryForwardAmount
Namespace Prefix:	pdo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant