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BALANCE SHEET COMPONENTS - Other Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Balance Sheet Related Disclosures [Abstract] |  |
PCBAs | $ 18,599 | $ 13,863
Cloud computing arrangements | 2,523 | 1,427
Other | 1,130 | 762
Other assets | $ 22,252 | $ 16,052

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- Definition Cloud Computing Arrangements + References No definition available. + Details
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Namespace Prefix: | irtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Printed Circuit Board Assemblies + References No definition available. + Details
Name: | irtc_PrintedCircuitBoardAssemblies
Namespace Prefix: | irtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Balance Type: | na
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X
- Definition Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of noncurrent assets classified as other. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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