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Subsequent Event (Details) (USD $)	Aug. 13, 2012
Subsequent Event (Textual) [Abstract]
Common stock acquisition proposed stock price	$ 8.50

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- Definition

Common stock acquisition proposed stock price.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

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- Details

Name:	pvsw_SubsequentEventTextualAbstract
Namespace Prefix:	pvsw_
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Period Type:	duration