REDEEMABLE CONVERTIBLE PREFERRED STOCK ESCROWED PROCEEDS AND STOCKHOLDERS EQUITY (Details 4)	9 Months Ended
Mar. 31, 2024 shares
REDEEMABLE CONVERTIBLE PREFERRED STOCK ESCROWED PROCEEDS AND STOCKHOLDERS EQUITY
Outstanding at beginning of year	987,521
Granted	0
Forfeited	(2,302)
Expired	18,000
Vested	(98,372)
Outstanding at ending of year	868,847

No definition available.

Name:	ptn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEndingBalance
Namespace Prefix:	ptn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	ptn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityBeginningBalance
Namespace Prefix:	ptn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	ptn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested
Namespace Prefix:	ptn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	ptn_StockholdersEquityAndRedeemableConvertiblePreferredStockAbstract
Namespace Prefix:	ptn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares under non-option equity instrument agreements for which rights to exercise lapsed.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Net number of non-option equity instruments granted to participants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration