Debt instrument, basis spread deduction on variable rate.

No definition available.

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant Compliance, Amount

+ References

No definition available.

+ Details

Name:	irtc_DebtInstrumentCovenantComplianceAmount
Namespace Prefix:	irtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Covenant, Quick Ratio

+ References

No definition available.

+ Details

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Namespace Prefix:	irtc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Payments Consecutive Monthly Installments

+ References

No definition available.

+ Details

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Namespace Prefix:	irtc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Remaining Borrowing Capacity, Increments Drawn

+ References

No definition available.

+ Details

Name:	irtc_LineOfCreditFacilityRemainingBorrowingCapacityIncrementsDrawn
Namespace Prefix:	irtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
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 the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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

- Details

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- Details

Name:	srt_RangeAxis=srt_MinimumMember
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- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=irtc_SiliconValleyBankTermLoanMember
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- Details

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- Details

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Debt - Narrative (Details)			1 Months Ended	9 Months Ended
Debt - Narrative (Details)	Mar. 28, 2022 USD ($) paymentInstallment	Mar. 27, 2022	Oct. 31, 2018 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of debt				$ 35,000,000	$ 0
2022 Term Loan
Debt Instrument [Line Items]
Debt instrument, covenant compliance, amount	$ 15,000,000
Minimum \| 2022 Term Loan
Debt Instrument [Line Items]
Debt instrument, covenant, quick ratio	100.00%
Maximum \| 2022 Term Loan
Debt Instrument [Line Items]
Debt instrument, covenant, quick ratio	115.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 25,000,000
Letter of Credit \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	15,000,000
Cash Management Services \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 15,000,000
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan
Debt Instrument [Line Items]
Proceeds from issuance of debt			$ 35,000,000
Amount outstanding under revolving credit line						$ 18,500,000
Commitment fee percentage	5.00%
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan \| 2022 Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 75,000,000
Proceeds from line of credit	35,000,000
Line of credit facility, remaining borrowing capacity	40,000,000
Term loan borrowed installments	$ 10,000,000
Repayment consecutive monthly installments \| paymentInstallment	24
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan \| 2018 Term Loan
Debt Instrument [Line Items]
Repayment of long-term line of credit	$ 18,500,000
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan \| Minimum
Debt Instrument [Line Items]
Commitment fee percentage	1.00%
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan \| Maximum
Debt Instrument [Line Items]
Commitment fee percentage		3.00%
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan \| Prime rate
Debt Instrument [Line Items]
Basis spread deduction on variable rate (in percentage)	3.50%
Third Amended and Restated SVB Loan Agreement \| SVB Term Loan \| Prime rate \| 2022 Term Loan
Debt Instrument [Line Items]
Line of credit facility interest rate	0.25%
Third Amended and Restated SVB Loan Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Amount outstanding under revolving credit line				$ 0
Commitment fee percentage	0.15%
Third Amended and Restated SVB Loan Agreement \| Revolving Credit Facility \| Prime rate
Debt Instrument [Line Items]
Basis spread deduction on variable rate (in percentage)	3.50%
Third Amended and Restated SVB Loan Agreement \| Revolving Credit Facility \| Prime rate \| 2022 Term Loan
Debt Instrument [Line Items]
Line of credit facility interest rate	0.25%