Stock Based Compensation (Details 2) (Warrant [Member], USD $)	12 Months Ended
Dec. 31, 2011
Warrant [Member]
Grant Date	Nov. 30, 2008
Strike Price	$ 3.20
Expiration Date	Oct. 31, 2012
Warrants Remaining	15,000
Proceeds if Exercised	48,000
Call Feature	None

Description of a feature that permits the issuer of the options to repay or convert it before the stated maturity date (early retirement date).

No definition available.

Name:	pdo_ShareBasedCompensationArrangementByShareBasedPaymentOptionsCallFeature
Namespace Prefix:	pdo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration