XML 71 R58.htm IDEA: XBRL DOCUMENT v3.22.2.2

Fair Value Measurements - Summary of Assets that are Measured at Fair Value on a Recurring Basis (Detail) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Inputs, Level 1 [Member] | Social Capital Suvretta Holdings Corp. III [Member]
Assets:
Marketable securities held in Trust Account	$ 250,371,095	$ 250,008,324

X

- Definition

Marketable securities held to maturity fair value disclosure.

+ References

No definition available.

+ Details

Name:	prok_MarketableSecuritiesHeldToMaturityFairValueDisclosure
Namespace Prefix:	prok_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Details

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

X

- Details

Name:	dei_LegalEntityAxis=prok_SocialCapitalSuvrettaHoldingsCorp.IiiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: