XML 60 R40.htm IDEA: XBRL DOCUMENT
v3.25.1

Investments - Schedule of Investments Fair Values and Gross Unrealized (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Less than 12 months, Fair Value | $ 36,312 | $ 78,847
Less than 12 months, Unrealized Loss | (44) | (48)
12 months or Greater, Fair Value | 0 | 0
12 months or Greater, Unrealized Loss | 0 | 0
Total, Fair Value | 36,312 | 78,847
Total, Unrealized Loss | (44) | (48)
Time deposits (Member) |  |
Less than 12 months, Fair Value |  | 0
Less than 12 months, Unrealized Loss |  | 0
12 months or Greater, Fair Value |  | 0
12 months or Greater, Unrealized Loss |  | 0
Total, Fair Value |  | 0
Total, Unrealized Loss |  | 0
Commercial Paper [Member] |  |
Less than 12 months, Fair Value | 3,869 | 52,783
Less than 12 months, Unrealized Loss | (2) | (28)
12 months or Greater, Fair Value | 0 | 0
12 months or Greater, Unrealized Loss | 0 | 0
Total, Fair Value | 3,869 | 52,783
Total, Unrealized Loss | (2) | (28)
Government Bond [Member] |  |
Less than 12 months, Fair Value |  | 9,986
Less than 12 months, Unrealized Loss |  | (13)
12 months or Greater, Fair Value |  | 0
12 months or Greater, Unrealized Loss |  | 0
Total, Fair Value |  | 9,986
Total, Unrealized Loss |  | (13)
Corporate Debt Securities [Member] |  |
Less than 12 months, Fair Value | 32,443 | 16,078
Less than 12 months, Unrealized Loss | (42) | (7)
12 months or Greater, Fair Value | 0 | 0
12 months or Greater, Unrealized Loss | 0 | 0
Total, Fair Value | 32,443 | 16,078
Total, Unrealized Loss | $ (42) | $ (7)

X
- Definition Available-for-Sale Securities, Continuous Unrealized Loss Positions, 12 Months or Longer, Fair Value + References No definition available. + Details
Name: | prok_AvailableForSaleSecuritiesContinuousUnrealizedLossPositions12MonthsOrLongerFairValue
Namespace Prefix: | prok_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available-for-Sale Securities, Continuous Unrealized Loss Positions, Fair Value + References No definition available. + Details
Name: | prok_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionsFairValue
Namespace Prefix: | prok_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available-for-Sale Securities, Continuous Unrealized Loss Positions, Less than 12 Months, Fair Value + References No definition available. + Details
Name: | prok_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionsLessThan12MonthsFairValue
Namespace Prefix: | prok_
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), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
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), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
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), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=prok_TimeDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=prok_GovernmentBondMember
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: |