Payments of cash to service providers during the current period.

No definition available.

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Balance Type:	credit
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- Definition

The monthly severance payments pursuant to the separation agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	plxp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The period for monthly severance payments pursuant separation agreement.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

The fee payable each month by the reporting entity under a service agreement.

+ References

No definition available.

+ Details

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

- References

No definition available.

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- References

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of gain (loss) from the disposal of an asset through means other than sale, for example, but not limited to, abandonment, spin-off, and expropriation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 15
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- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
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-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

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Balance Type:	debit
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- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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Note 7 - Commitments and Contingencies (Details Textual) - USD ($)				3 Months Ended			9 Months Ended
	Jul. 31, 2017	May 01, 2017	Mar. 21, 2017	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating Leases, Rent Expense, Net, Total				$ 29,753		$ 69,516	$ 86,890	$ 129,879
Research and Development Expense, Total				1,219,144		958,255	3,032,426	1,712,890
Former Acting Chief Financial Officer [Member]
Separation Agreement , Monthly Severance Payments	$ 12,500
Separation Agreement , Monthly Severance Payments, Period	1 year
Patent License Agreement with the Board of Regents of the University of Texas (NSAIDs) [Member]
Research and Development Expense, Total				$ 10,667		$ 7,527	$ 58,522	$ 56,039
Investor Relations Agreement [Member]
Payments to Service Providers			$ 11,250
Service Agreement, Monthly Fee		$ 15,000
Service Agreement, Monthly Fee Payable in Cash		7,500
Service Agreement, Monthly Fee Payable in Common Stock		$ 7,500
Stock Issued During Period, Shares, Issued for Services							15,340
Assets Leased to Others [Member]
Assets Disposed of by Method Other than Sale, in Period of Disposition, Gain (Loss) on Disposition					$ (200,000)
Operating Leases, Future Minimum Payments Receivable, Total					$ 606,000