Fair Value - Schedule of Fair Value Assumptions of Warrants and Embedded Conversion Feature (Details)	Mar. 05, 2018 $ / shares	Sep. 30, 2017 $ / shares
Warrant liability fair value assumptions, measurement input, exercise price		$ 30.00
Warrant liability fair value assumptions, measurement input, term		2 years
Monte Carlo Simulation [Member] \| Stock Price [Member] \| Warrant Liability [Member]
Warrant liability fair value assumptions, measurement input, stock price	$ 20.05
Monte Carlo Simulation [Member] \| Exercise Price [Member] \| Warrant Liability [Member]
Warrant liability fair value assumptions, measurement input, exercise price	$ 30.00
Monte Carlo Simulation [Member] \| Risk Free Rate [Member] \| Warrant Liability [Member]
Warrant liability fair value assumptions, measurement input, percentages	0.022
Monte Carlo Simulation [Member] \| Volatility [Member] \| Warrant Liability [Member]
Warrant liability fair value assumptions, measurement input, percentages	0.882
Monte Carlo Simulation [Member] \| Term [Member] \| Warrant Liability [Member]
Warrant liability fair value assumptions, measurement input, term	1 year 6 months
Series F Conversion Feature [Member] \| Monte Carlo Simulation [Member] \| Stock Price [Member]
Embedded conversion feature fair value assumptions, measurement input, price per share	$ 20.05
Series F Conversion Feature [Member] \| Monte Carlo Simulation [Member] \| Exercise Price [Member]
Embedded conversion feature fair value assumptions, measurement input, price per share	$ 27.50
Series F Conversion Feature [Member] \| Monte Carlo Simulation [Member] \| Risk Free Rate [Member]
Embedded conversion feature fair value assumptions, measurement input, percentages	0.022
Series F Conversion Feature [Member] \| Monte Carlo Simulation [Member] \| Volatility [Member]
Embedded conversion feature fair value assumptions, measurement input, percentages	0.882
Series F Conversion Feature [Member] \| Monte Carlo Simulation [Member] \| Term [Member]
Embedded conversion feature fair value assumptions, measurement input, term	1 year 6 months

Alternative investment measurement input price per share.

No definition available.

Name:	PTE_AlternativeInvestmentMeasurementInputPricePerShare
Namespace Prefix:	PTE_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Alternative investment measurement input term.

+ References

No definition available.

+ Details

Name:	PTE_AlternativeInvestmentMeasurementInputTerm
Namespace Prefix:	PTE_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Warrants and rights outstanding measurement input price per share.

+ References

No definition available.

+ Details

Name:	PTE_WarrantsAndRightsOutstandingMeasurementInputPricePerShare
Namespace Prefix:	PTE_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Value of input used to measure alternative investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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