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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)						3 Months Ended			6 Months Ended		12 Months Ended
	Feb. 27, 2020 USD ($) Clinic Partnership	Sep. 30, 2019 USD ($) Installment Clinic	Apr. 11, 2019 USD ($) State Location		Apr. 30, 2018 Business	Jun. 30, 2020 USD ($) Clinic State	Mar. 31, 2020 Employee	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Installment Clinic Segment Facility State	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Partnership Region	May 02, 2020 Employee	Apr. 30, 2020 USD ($)	Mar. 31, 2017
Basis of Presentation [Abstract]
Number of reportable segments | Segment									2
Percentage of general partnership interest owned									1.00%
Number of partnerships | Partnership											4
Number of closed clinics sold | Clinic						11			11
Aggregate sale price of clinics									$ 1,100,000
Cash received related to sale of closed clinics						$ 700,000			700,000
Note receivable related to sale of closed clinics						$ 400,000			$ 400,000
Number of installments for note receivable | Installment									2
Number of clinics operated | Clinic						554			554
Number of states where clinics are operated | State						39			39
Number of third party facilities | Facility									29
Percentage of employees furloughed or terminated							40.00%
Number of full and part-time workforce | Employee							5,500
Number of furloughed employees returned | Employee												750
Percentage of business operational									90.00%
Deferment of depositing employer's share social security taxes included in accrued liabilities						$ 2,200,000			$ 2,200,000
Long-Lived Assets [Abstract]
Impairment of long lived assets						0
Impairment of long lived assets to be disposed of						0
Goodwill [Abstract]
Number of business segments | Segment									1
Number of regions | Region											6
Write-off of goodwill - closed clinics						0		$ 0	$ 1,859,000	$ 0	$ 0
Income Taxes [Abstract]
Unrecognized tax benefit									0
Accrued interest and penalties associated with any unrecognized tax benefits						0			0
Interest expense recognized									$ 0
Segment Reporting [Abstract]
Number of operating segments | Segment									2
Medicare Accelerated and Advance Payments Program [Member]
Basis of Presentation [Abstract]
Funds received													$ 12,800,000
Public Health and Social Services Emergency Fund [Member]
Basis of Presentation [Abstract]
Funds received						$ 7,900,000			$ 7,900,000
Clinic Practice [Member]
Basis of Presentation [Abstract]
Percentage of interest acquired	65.00%	67.00%
Number of partnerships | Partnership	4
Aggregate purchase price for the acquired clinic practices	$ 11,900,000	$ 12,400,000
Cash paid for acquisition of interest in clinic	11,600,000	12,100,000
Seller note	$ 300,000	$ 300,000
Percentage of interest accrued	4.75%	5.00%
Number of installments | Installment		2
Principal installments		$ 150,000
Number of businesses acquired | Clinic	4	11
IIPS [Member]
Basis of Presentation [Abstract]
Number of states of network services | State			45
Number of onsite client locations | Location			11
Percentage of interest acquired			76.00%		65.00%									55.00%
Aggregate purchase price for the acquired clinic practices			$ 23,600,000
Cash paid for acquisition of interest in clinic			18,900,000
Seller note		$ 4,000,000.0	$ 4,000,000	[1]
Percentage of interest accrued			5.50%
Number of businesses merged | Business					2
Percentage of combined business interest owned					59.45%
Number of businesses acquired | Business					2
Employee [Member]
Restricted Stock [Abstract]
Period in which restrictions lapse on stock granted									4 years
Director [Member]
Restricted Stock [Abstract]
Period in which restrictions lapse on stock granted									1 year
Officer [Member]
Restricted Stock [Abstract]
Period in which restrictions lapse on stock granted									4 years
Minimum [Member]
Basis of Presentation [Abstract]
Percentage of limited partnership interest owned									49.00%
Percentage of interest acquired											1.00%
Redeemable Non-Controlling Interests [Abstract]
Redeemable non-controlling interest, redemption rights, commencement period									3 years
Minimum [Member] | Furniture & Equipment [Member]
Long-Lived Assets [Abstract]
Estimated useful lives									3 years
Minimum [Member] | Software [Member]
Long-Lived Assets [Abstract]
Estimated useful lives									3 years
Minimum [Member] | Leasehold Improvements [Member]
Long-Lived Assets [Abstract]
Estimated useful lives									3 years
Minimum [Member] | Clinic Practice [Member]
Basis of Presentation [Abstract]
Percentage of interest acquired	10.00%
Maximum [Member]
Basis of Presentation [Abstract]
Percentage of limited partnership interest owned									99.00%
Percentage of interest acquired											55.00%
Redeemable Non-Controlling Interests [Abstract]
Redeemable non-controlling interest, redemption rights, commencement period									5 years
Maximum [Member] | Furniture & Equipment [Member]
Long-Lived Assets [Abstract]
Estimated useful lives									8 years
Maximum [Member] | Software [Member]
Long-Lived Assets [Abstract]
Estimated useful lives									7 years
Maximum [Member] | Leasehold Improvements [Member]
Long-Lived Assets [Abstract]
Estimated useful lives									5 years
Maximum [Member] | Clinic Practice [Member]
Basis of Presentation [Abstract]
Percentage of interest acquired	83.80%
[1] Industrial injury prevention services

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Balance Type:	na
Period Type:	duration

X

- Definition

This element represents number of states of network services provided by the company.

+ References

No definition available.

+ Details

Name:	usph_NumberOfStatesOfNetworkServices
Namespace Prefix:	usph_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of third party facilities.

+ References

No definition available.

+ Details

Name:	usph_NumberOfThirdPartyFacilities
Namespace Prefix:	usph_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of business currently operational.

+ References

No definition available.

+ Details

Name:	usph_PercentageOfBusinessOperational
Namespace Prefix:	usph_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of combined business interest owned during the period.

+ References

No definition available.

+ Details

Name:	usph_PercentageOfCombinedBusinessInterestOwned
Namespace Prefix:	usph_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of employees furloughed or terminated due to pandemic.

+ References

No definition available.

+ Details

Name:	usph_PercentageOfEmployeesFurloughedOrTerminated
Namespace Prefix:	usph_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of general partnership interest owned during the period.

+ References

No definition available.

+ Details

Name:	usph_PercentageOfGeneralPartnershipInterestOwned
Namespace Prefix:	usph_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of limited partnership interest owned during the period.

+ References

No definition available.

+ Details

Name:	usph_PercentageOfLimitedPartnershipInterestOwned
Namespace Prefix:	usph_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Refers to the commencement period of redemption rights for redeemable non controlling interest.

+ References

No definition available.

+ Details

Name:	usph_RedeemableNonControllingInterestRedemptionRightsCommencementPeriod
Namespace Prefix:	usph_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=usph_MedicareAcceleratedAndAdvancePaymentsProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=usph_PublicHealthAndSocialServicesEmergencyFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=usph_ClinicPracticeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=usph_LeadingProviderOfIndustrialInjuryPreventionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=usph_EmployeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_DirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_OfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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