Number Of Tranches Upon Satisfaction

No definition available.

Name:	acel_NumberOfTranchesUponSatisfaction
Namespace Prefix:	acel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Shareholders Equity, Conversion Terms, Closing Price Of Stock, Maximum

+ References

No definition available.

+ Details

Name:	acel_ShareholdersEquityConversionTermsClosingPriceOfStockMaximum
Namespace Prefix:	acel_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Shareholders Equity, Conversion Terms, Number Of Shares Converted

+ References

No definition available.

+ Details

Name:	acel_ShareholdersEquityConversionTermsNumberOfSharesConverted
Namespace Prefix:	acel_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Shareholders' Equity, Conversion Terms, Threshold Consecutive Trading Days

+ References

No definition available.

+ Details

Name:	acel_ShareholdersEquityConversionTermsThresholdConsecutiveTradingDays
Namespace Prefix:	acel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Shareholders' Equity, Conversion Terms, Threshold Trading Days

+ References

No definition available.

+ Details

Name:	acel_ShareholdersEquityConversionTermsThresholdTradingDays
Namespace Prefix:	acel_
Data Type:	xbrli:integerItemType
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-4

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-4

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

+ Details

Name:	us-gaap_BusinessAcquisitionContingentConsiderationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

+ Details

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

- Details

Name:	acel_ShareConversionScenarioAxis=acel_ShareConversionTranche3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	acel_ShareConversionScenarioAxis=acel_ShareConversionTranche2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=acel_ClassA2CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	acel_ShareConversionScenarioAxis=acel_ShareConversionTranche1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Contingent Earnout Share Liability (Details)	3 Months Ended
Contingent Earnout Share Liability (Details)	Mar. 31, 2026 day $ / shares shares	Dec. 31, 2020 shares	Dec. 31, 2019 tranche shares	Nov. 20, 2019 shares
Tranche III - LTM EBITDA or 20 trading days in consecutive 30 day trading period
Business Combination, Contingent Consideration [Line Items]
Maximum stock price of common stock before conversion (in usd per share) \| $ / shares	$ 16.00
Tranche II - LTM EBITDA or 20 trading days in consecutive 30 day trading period
Business Combination, Contingent Consideration [Line Items]
Maximum stock price of common stock before conversion (in usd per share) \| $ / shares	$ 14.00
Class A-2 Common Stock
Business Combination, Contingent Consideration [Line Items]
Class A-1 common stock reserved for issuance (in shares)				10,000,000
Class A-2 Common Stock \| Tranche III - LTM EBITDA or 20 trading days in consecutive 30 day trading period
Business Combination, Contingent Consideration [Line Items]
Number of shares converted (in shares)	1,666,667	1,666,636
Threshold trading days \| day	20
Threshold consecutive trading days \| day	30
Class A-2 Common Stock \| Tranche I - EBITDA for last 12 months or 20 trading days in consecutive 30 day trading period
Business Combination, Contingent Consideration [Line Items]
Number of shares converted (in shares)		1,666,666
Class A-2 Common Stock \| Tranche II - LTM EBITDA or 20 trading days in consecutive 30 day trading period
Business Combination, Contingent Consideration [Line Items]
Number of shares converted (in shares)	1,666,667
Threshold trading days \| day	20
Threshold consecutive trading days \| day	30
Class A-2 Common Stock \| Common Stock
Business Combination, Contingent Consideration [Line Items]
Shares issued (in shares)			5,000,000
Number of tranches upon satisfaction \| tranche			3