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Condensed Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) (Parenthetical) $ in Thousands	3 Months Ended
	Jun. 30, 2021 USD ($)
Statement of Financial Position [Abstract]
Issuance costs and underwriting discount	$ 11,813

X

- Definition

Sale of Stock, Underwriting Discount, Commissions, and Deferred Offering Costs

+ References

No definition available.

+ Details

Name:	npce_SaleOfStockUnderwritingDiscountCommissionsAndDeferredOfferingCosts
Namespace Prefix:	npce_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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