Collaborations and license agreements upfront fee.

No definition available.

Name:	pali_CollaborationsAndLicenseAgreementsUpfrontFee
Namespace Prefix:	pali_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Milestone payments.

+ References

No definition available.

+ Details

Name:	pali_MilestonePayments
Namespace Prefix:	pali_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of license agreements in place.

+ References

No definition available.

+ Details

Name:	pali_NumberOfLicenseAgreements
Namespace Prefix:	pali_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the royalty rate on the portion of sublicense income to be paid, expressed as a percentage of one-third of the upfront payment and milestone payment received.

+ References

No definition available.

+ Details

Name:	pali_RoyaltyRatePortionOfSublicenseIncomeToBePaidPercentageOfOneThirdOfUpfrontPaymentAndMilestonePaymentReceived
Namespace Prefix:	pali_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6935-107765

+ Details

Name:	us-gaap_AccruedRoyaltiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

+ Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=pali_LicenseAgreementsWithTheRegentsOfTheUniversityOfCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 9 - Collaborations and License Agreements (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) Agreement	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Agreement	Sep. 30, 2021 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2021 USD ($)
Collaborations and License Agreements Upfront Fee					$ 1,000,000.0
Royalty Expense					$ 6,750,000
Milestone Payments	$ 0	$ 0	$ 0	$ 0
License Agreements with the Regents of the University of California [Member]
Number of License Agreements \| Agreement	3		3
Royalty Rate, Portion of Sublicense Income to Be Paid, Percentage of One-third of Upfront Payment and Milestone Payment Received	30.00%		30.00%
Accrued Royalties, Current	$ 40,000,000		$ 40,000,000			$ 81,000,000