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Subsequent Events (Details)	Jun. 30, 2011
Subsequent Events Merger Agreement Abstract
Merger Share Exchange Ratio	2.6125

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- Definition

Discloses the number of shares of the acquirer's stock that each share of the acquiree's stock will be converted into in conjuction with a merger.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	pgn_SubsequentEventsMergerAgreementAbstract
Namespace Prefix:	pgn
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration