Name:	pti_DeferredCompensationArrangementwithIndividualPercentageinExcessofCapitalContributionsReceivedbyParentResultinginExitEvent
Namespace Prefix:	pti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Deferred Compensation Arrangement with Individual, Threshold Parent Ownership Percentage Resulting in Exit Event

No definition available.

Name:	pti_DeferredCompensationArrangementwithIndividualThresholdParentOwnershipPercentageResultinginExitEvent
Namespace Prefix:	pti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number of Days after Fiscal Year To Determine Plan Details

No definition available.

Name:	pti_NumberofDaysafterFiscalYearToDeterminePlanDetails
Namespace Prefix:	pti_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

No definition available.