SUBSEQUENT EVENTS (Details) - Subsequent event - Merger Agreement	Oct. 21, 2020 $ / shares
Subsequent Event [Line Items]
Common stock, price per share	$ 10.00
Number of business days	2 days
First Threshold
Subsequent Event [Line Items]
Number of months following the closing	60 months
Stock price trigger	$ 12.50
Threshold number of trading days	20 days
Threshold consecutive trading days	30 days
Percentage of earnout shares	50.00%
Second Threshold
Subsequent Event [Line Items]
Stock price trigger	$ 15.00
Threshold number of trading days	20 days
Threshold consecutive trading days	30 days
Percentage of earnout shares	50.00%

Represents the stock price trigger over any specified trading days in a consecutive trading day period under a merger.

No definition available.

Name:	acam_MergerAgreementStockPriceTrigger
Namespace Prefix:	acam_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the threshold consecutive trading day period in a stock exchange, under a merger agreeement.

+ References

No definition available.

+ Details

Name:	acam_MergerAgreementThresholdConsecutiveTradingDays
Namespace Prefix:	acam_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold number of specified trading days that common stock price is greater within a consecutive trading day period under a merger agreement.

+ References

No definition available.

+ Details

Name:	acam_MergerAgreementThresholdTradingDays
Namespace Prefix:	acam_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the duration of months following the Closing (the first business day following the end of such period, the "Forfeiture Date").

+ References

No definition available.

+ Details

Name:	acam_NumberOfTermFollowingClosingForfeitureDate
Namespace Prefix:	acam_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Earnout Shares to the holders of CarLotz Stock as of immediately prior to the effective time of the Merger.

+ References

No definition available.

+ Details

Name:	acam_PercentageOfEarnoutSharesToHoldersAsOfImmediatelyPriorToTimeOfMerger
Namespace Prefix:	acam_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of business days in the redemption offer under the merger agreement.

+ References

No definition available.

+ Details

Name:	acam_RedemptionOfferNumberOfBusinessDays
Namespace Prefix:	acam_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_StatementScenarioAxis=acam_ScenarioOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=acam_ScenarioTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: