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Finance Lease Receivables - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
Financing Receivable, Net [Abstract]
Lease agreement term	10 years

X

- Definition

Lease Agreement Terms

+ References

No definition available.

+ Details

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Namespace Prefix:	sopw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Details

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Balance Type:	na
Period Type:	duration