Leases - Schedule of Future Minimum Lease Payments (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Future Rental Payments [Abstract]
2021	$ 4,981
2022	6,752
2023	6,851
2024	6,958
2025	7,095
Thereafter	12,736
Total	45,373
Accretion of Lease Liability [Abstract]
2021	(205)
2022	(713)
2023	(1,164)
2024	(1,602)
2025	(2,051)
Thereafter	(4,660)
Total	(10,395)
Operating Lease Obligation [Abstract]
2021	4,776
2022	6,039
2023	5,687
2024	5,356
2025	5,044
Thereafter	8,076
Total	$ 34,978

Lessee operating lease accretion of lease liability.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease accretion of lease liability.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityAbstract
Namespace Prefix:	rhe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Lessee operating lease accretion of lease liability due after year four.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityDueAfterYearFour
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease accretion of lease liability due year four.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityDueYearFour
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease accretion of lease liability due year one.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityDueYearOne
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease accretion of lease liability due year three.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityDueYearThree
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease accretion of lease liability due year two.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityDueYearTwo
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease accretion of lease liability remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseAccretionOfLeaseLiabilityRemainderOfFiscalYear
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPayments
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsAbstract
Namespace Prefix:	rhe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Lessee operating lease liability future rental payments due after year four.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsDueAfterYearFour
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments due year four.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsDueYearFour
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments due year one.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsDueYearOne
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments due year three.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsDueYearThree
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments due year two.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsDueYearTwo
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee operating lease liability future rental payments remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityFutureRentalPaymentsRemainderOfFiscalYear
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rhe_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour
Namespace Prefix:	rhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

+ Details

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

- References

No definition available.

+ Details

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