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Summary of Significant Accounting Policies (Details Narrative)	9 Months Ended
	Sep. 30, 2016 USD ($)
Accounting Standards Update 2015-03 [Member]
Reclassified of debt issuance cost from other assets	$ 438,000

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- Definition

Reclassified of debt issuance cost from other assets.

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No definition available.

+ Details

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Namespace Prefix:	PW_
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Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201503Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: