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CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022
Cash Equivalents And Investments [Abstract]
Available-for-sale securities, weighted average days to maturity	114 days

X

- Definition

Available-for-sale debt securities maturity period.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Cash Equivalents and Investments.

+ References

No definition available.

+ Details

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