XML 46 R35.htm IDEA: XBRL DOCUMENT v3.8.0.1

Cash Equivalents and Investments - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017
Cash And Cash Equivalents [Abstract]
Available-for-sale securities, weighted average days to maturity	122 days

X

- Definition

Available-for-sale securities maturity period.

+ References

No definition available.

+ Details

Name:	irtc_AvailableForSaleSecuritiesMaturityPeriod
Namespace Prefix:	irtc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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