XML 49 R39.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Investments and Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial Assets
Assets, Fair Value Disclosure	$ 246,766	$ 208,692
Commercial paper
Financial Assets
Marketable investments	31,445	39,756
Certificate of Deposit
Financial Assets
Marketable investments	4,636	6,401
U.S. treasury
Financial Assets
Marketable investments	13,068	10,066
U.S. states and municipalities
Financial Assets
Marketable investments	891	2,915
Corporate bonds
Financial Assets
Marketable investments	40,320	62,563
Non-marketable investments
Financial Assets
Marketable investments	10,000
Commercial paper
Financial Assets
Cash equivalents	30,555
Certificate of Deposit
Financial Assets
Cash equivalents	4,901
Money market funds
Financial Assets
Cash equivalents	57,278	86,991
U.S. treasury
Financial Assets
Cash equivalents	53,672
Level 1
Financial Assets
Assets, Fair Value Disclosure	124,018	97,057
Level 1 | Commercial paper
Financial Assets
Marketable investments	0	0
Level 1 | Certificate of Deposit
Financial Assets
Marketable investments	0	0
Level 1 | U.S. treasury
Financial Assets
Marketable investments	13,068	10,066
Level 1 | U.S. states and municipalities
Financial Assets
Marketable investments	0	0
Level 1 | Corporate bonds
Financial Assets
Marketable investments	0	0
Level 1 | Non-marketable investments
Financial Assets
Marketable investments	0
Level 1 | Commercial paper
Financial Assets
Cash equivalents	0
Level 1 | Certificate of Deposit
Financial Assets
Cash equivalents	0
Level 1 | Money market funds
Financial Assets
Cash equivalents	57,278	86,991
Level 1 | U.S. treasury
Financial Assets
Cash equivalents	53,672
Level 2
Financial Assets
Assets, Fair Value Disclosure	112,748	111,635
Level 2 | Commercial paper
Financial Assets
Marketable investments	31,445	39,756
Level 2 | Certificate of Deposit
Financial Assets
Marketable investments	4,636	6,401
Level 2 | U.S. treasury
Financial Assets
Marketable investments	0	0
Level 2 | U.S. states and municipalities
Financial Assets
Marketable investments	891	2,915
Level 2 | Corporate bonds
Financial Assets
Marketable investments	40,320	62,563
Level 2 | Non-marketable investments
Financial Assets
Marketable investments	0
Level 2 | Commercial paper
Financial Assets
Cash equivalents	30,555
Level 2 | Certificate of Deposit
Financial Assets
Cash equivalents	4,901
Level 2 | Money market funds
Financial Assets
Cash equivalents	0	0
Level 2 | U.S. treasury
Financial Assets
Cash equivalents	0
Level 3
Financial Assets
Assets, Fair Value Disclosure	10,000	0
Level 3 | Commercial paper
Financial Assets
Marketable investments	0	0
Level 3 | Certificate of Deposit
Financial Assets
Marketable investments	0	0
Level 3 | U.S. treasury
Financial Assets
Marketable investments	0	0
Level 3 | U.S. states and municipalities
Financial Assets
Marketable investments	0	0
Level 3 | Corporate bonds
Financial Assets
Marketable investments	0	0
Level 3 | Non-marketable investments
Financial Assets
Marketable investments	10,000
Level 3 | Commercial paper
Financial Assets
Cash equivalents	0
Level 3 | Certificate of Deposit
Financial Assets
Cash equivalents	0
Level 3 | Money market funds
Financial Assets
Cash equivalents	0	$ 0
Level 3 | U.S. treasury
Financial Assets
Cash equivalents	$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481830/320-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=pen_NonMarketableInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: