Cash pledged under credit agreement.

No definition available.

Name:	nari_CashPledgedUnderCreditAgreement
Namespace Prefix:	nari_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Legal and other fees.

+ References

No definition available.

+ Details

Name:	nari_LegalAndOtherFees
Namespace Prefix:	nari_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line of credit closing fee.

+ References

No definition available.

+ Details

Name:	nari_LineOfCreditClosingFee
Namespace Prefix:	nari_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of letter of credit.

+ References

No definition available.

+ Details

Name:	nari_NumberOfLetterOfCredit
Namespace Prefix:	nari_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of accounts receivable available to borrow.

+ References

No definition available.

+ Details

Name:	nari_PercentageOfAccountsReceivableAvailableToBorrow
Namespace Prefix:	nari_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of additional increase in interest rate of loan outstanding for default.

+ References

No definition available.

+ Details

Name:	nari_PercentageOfAdditionalIncreaseInInterestRateOfLoanOutstandingForDefault
Namespace Prefix:	nari_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of fee on average daily stated amount of outstanding letter of credit.

+ References

No definition available.

+ Details

Name:	nari_PercentageOfFeeOnAverageDailyStatedAmountOfOutstandingLetterOfCredit
Namespace Prefix:	nari_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of fronting fee on stated amount of each letter of credit outstanding.

+ References

No definition available.

+ Details

Name:	nari_PercentageOfFrontingFeeOnStatedAmountOfEachLetterOfCreditOutstanding
Namespace Prefix:	nari_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The month and year (YYYY-MM) in which the original debt was scheduled to mature.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

+ Details

Name:	us-gaap_DebtConversionOriginalDebtDueDateOfDebtMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of reference rate used for variable rate of debt instrument.

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

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

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=nari_BankOfAmericaCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=nari_SeniorSecuredRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=nari_LondonInterbankOfferedRateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Additional Information (Details)	1 Months Ended		3 Months Ended	12 Months Ended
Debt - Additional Information (Details)	Mar. 31, 2022 USD ($) LetterOfCredit	Sep. 30, 2020 USD ($)	Mar. 31, 2022 USD ($) LetterOfCredit	Dec. 31, 2021 USD ($) LetterOfCredit
Debt Instrument [Line Items]
Number of Letter of Credit \| LetterOfCredit	2		2	2
Bank of America Credit Facility \| Credit Agreement
Debt Instrument [Line Items]
Line of credit closing fee	$ 150,000,000
Legal and other fees	$ 280,000,000
Line of credit facility covenant terms	The Credit Agreement contains certain customary covenants and events of default, including: payment defaults, breaches of any representation, warranty or covenants, judgment defaults, cross defaults to certain other contracts, certain events with respect to governmental approvals if such events could cause a material adverse change, a material impairment in the perfection or priority of the lender's security interest or in the value of the collateral, a material adverse change in the business, operations, or condition of us or any of our subsidiaries, and a material impairment of the prospect of repayment of the loans. Upon the occurrence of an event of default, a default increase in the interest rate of an additional 2.0% could be applied to the outstanding loan balance and the lender could declare all outstanding obligations immediately due and payable and take such other actions as set forth in the loan and security agreement.
Percentage of additional increase in interest rate of loan outstanding for default	2.00%
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 30,000,000
Percentage of accounts receivable available to borrow		85.00%
Principal amount outstanding			$ 0	$ 0
Cash pledged under credit agreement	$ 0		0	0
Interest on loans outstanding payable	monthly
Debt maturity month and year	2023-09
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement \| Federal Funds Rate
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the Federal funds rate plus 0.50%
Term loan variable interest rate	0.50%
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement \| LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the LIBOR rate based upon an interest period of 30 days plus 1.00%.
Term loan variable interest rate	1.00%
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement \| LIBOR \| LIBOR Loans
Debt Instrument [Line Items]
Term loan variable interest rate	2.00%
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement \| Maximum
Debt Instrument [Line Items]
Term loan variable interest rate	1.50%
Unused line fee at annual rate	0.375%
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement \| Maximum \| LIBOR \| LIBOR Loans
Debt Instrument [Line Items]
Term loan variable interest rate	2.50%
Bank of America Credit Facility \| Senior Secured Revolving Credit Facility \| Credit Agreement \| Minimum
Debt Instrument [Line Items]
Term loan variable interest rate	1.00%
Unused line fee at annual rate	0.25%
Bank of America Credit Facility \| Letter of Credit Subline Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 5,000,000		5,000,000
Percentage of fee on average daily stated amount of outstanding letter of credit	2.25%
Percentage of fronting fee on stated amount of each letter of credit outstanding	0.125%
Letters of credit outstanding amount	$ 1,800,000		$ 1,800,000	$ 1,800,000