Restructuring charges (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash components and activity associated with the realignment of workforce and business under the restructuring program
Balance at beginning of period	$ 195,773us-gaap_RestructuringReserve
Charges		600,000plpm_RestructuringChargesCashComponent
Cash Payments	116,645us-gaap_PaymentsForRestructuring
Balance at end of period	79,128us-gaap_RestructuringReserve
Severance and benefits
Cash components and activity associated with the realignment of workforce and business under the restructuring program
Balance at beginning of period	195,773
Cash Payments	116,645
Balance at end of period	$ 79,128

Cash component of expenses associated with exit or disposal activities pursuant to an authorized plan.

No definition available.

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Namespace Prefix:	plpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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