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Net (Loss) Income Per Share (Details Textual) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Net Loss Per Share (Textual)
Shares exercise excluded from computation of diluted net loss per share	980,588	573,110

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- References

No definition available.

+ Details

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Namespace Prefix:	peer_
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Balance Type:	na
Period Type:	duration

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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Period Type:	duration