Share-based compensation - Equity Incentive Plans (Details)	1 Months Ended
Jan. 31, 2022 shares	Mar. 31, 2023
2022 Plan
Share-based compensation
Common shares reserved to be issued as equity-based awards to directors and employees	3,000
Vesting period	4 years
2023 Plan
Share-based compensation
Increase in shares reserved and available for issuance as percentage of number of outstanding shares	4.00%
Exchange Ratio		373.47

Represents the exchange ratio.

No definition available.

Name:	uhg_ShareBasedCompensationArrangementByShareBasedPaymentAwardExchangeRatio
Namespace Prefix:	uhg_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Increase in shares reserved and available for issuance as percentage of number of outstanding shares

+ References

No definition available.

+ Details

Name:	uhg_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedAndAvailableForIssuanceAsPercentageOfNumberOfOutstandingShares
Namespace Prefix:	uhg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_PlanNameAxis=uhg_EquityIncentivePlan2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=uhg_EquityIncentivePlan2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: