Temporary Equity, Convertible, Conversion Price

No definition available.

Name:	upld_TemporaryEquityConvertibleConversionPrice
Namespace Prefix:	upld_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Temporary Equity Dividend Rate Percentage

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityDividendRatePercentage
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Temporary Equity, Liquidation Cash Purchase Price

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityLiquidationCashPurchasePrice
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Temporary Equity Liquidation Preference Percentage

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityLiquidationPreferencePercentage
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Temporary Equity, Percentage Of Common Stock Upon Conversion

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityPercentageOfCommonStockUponConversion
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Temporary Equity, Sale Of Stock, Aggregate Purchase Price

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquitySaleOfStockAggregatePurchasePrice
Namespace Prefix:	upld_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Temporary Equity, Stock Issued During Period, Shares, New Issues

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	upld_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Temporary Equity, Stock Issued During Period, Value, New Issues, Price Per Share

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityStockIssuedDuringPeriodValueNewIssuesPricePerShare
Namespace Prefix:	upld_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Temporary Equity Voting Power

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityVotingRightsBeneficialOwnershipAsAPercentage
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Temporary Equity, Voting Rights, Threshold For Electing A Non-voting Board Member Requirement And Not The Actual Ownership Percentage

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityVotingRightsThresholdForElectingANonVotingBoardMemberRequirementAndNotTheActualOwnershipPercentage
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Temporary Equity, Voting Rights, Threshold For Electing One Board Member And Not The Actual Ownership

+ References

No definition available.

+ Details

Name:	upld_TemporaryEquityVotingRightsThresholdForElectingOneBoardMemberAndNotTheActualOwnership
Namespace Prefix:	upld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

+ 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(24))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(15)(5))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: 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(20))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(15)(5))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

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

- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_TemporaryEquityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

No definition available.

+ Details

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

- Definition

The per share liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

No definition available.

+ Details

Name:	us-gaap_TemporaryEquityLiquidationPreferencePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=122040564&loc=d3e177068-122764

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (27)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_TemporaryEquityParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	upld_RateOfInterestAnniversaryAxis=upld_BeforeSevenYearAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	upld_RateOfInterestAnniversaryAxis=upld_AfterSevenYearAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Series A Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 14, 2022	Aug. 31, 2022	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Temporary Equity [Line Items]
Number of shares issued (in shares)		115,000
Temporary equity voting power			50.00%	50.00%
Threshold for electing one board member and not the actual ownership			5.00%	5.00%
Threshold for electing a non-voting board member requirement and not the actual ownership percentage			10.00%	10.00%
Series A Preferred Stock
Temporary Equity [Line Items]
Number of shares issued (in shares)	115,000		115,000
Convertible series A preferred stock, Par value (in dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Offering price per share (in dollars per share)		$ 1,000
Aggregate purchase price	$ 115.0
Stock issuance costs				$ 4.5
Accrued unpaid dividends			$ 0.5	0.5
Temporary equity, liquidation preference (in dollars per share)	$ 1,000
Percentage of outstanding common stock (percent)	19.90%
Temporary equity, liquidation preference			$ (115.5)	$ (115.5)
Liquidation cash purchase price (percent)				105.00%
Temporary equity liquidation preference (percent)				105.00%
Preferred stock, conversion price (in dollars per share)			$ 17.50	$ 17.50
Series A Preferred Stock \| Before Seven Year Anniversary
Temporary Equity [Line Items]
Temporary equity dividend rate percentage	4.50%	4.50%
Series A Preferred Stock \| After Seven Year Anniversary
Temporary Equity [Line Items]
Temporary equity dividend rate percentage	7.00%	7.00%