Altimar Acquisition Registration of securities issued in business combination transactions

Registration of securities issued in business combination transactions

Cover
- Cover Page
Financial Statements
Notes to Financial Statements
Accounting Policies
- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)
Notes Tables
Notes Details

RELATED PARTY TRANSACTIONS - Founder Shares (Details)

v3.21.2

RELATED PARTY TRANSACTIONS - Founder Shares (Details) - $ / shares			9 Months Ended
	Jan. 28, 2021	Dec. 15, 2020	Sep. 30, 2021	Feb. 09, 2021
Related Party Transaction [Line Items]
Shares subject to forfeiture (in shares)	1,125,000	1,125,000
Common stock, shares subject to forfeiture, as a percent of issued and outstanding shares	20.00%	20.00%
Number of shares no longer subject to forfeiture (in shares)				1,125,000
Stock price trigger to transfer, assign or sell any shares or warrants of the company, after the completion of the initial business combination (in dollars per share)		$ 12.00	$ 12.00
Threshold period for not to transfer, assign or sell any of their shares or warrants after the completion of the initial business combination		150 days	150 days
Maximum
Related Party Transaction [Line Items]
Threshold period after the business combination in which the 20 trading days within any 30 trading day period commences		20 days	20 days
Sponsor
Related Party Transaction [Line Items]
Threshold period after the business combination in which the 20 trading days within any 30 trading day period commences		30 days	30 days
Sponsor \| Founder Shares
Related Party Transaction [Line Items]
Founder Shared held by Sponsor (in shares)	8,450,000	8,625,000
Class B common stock \| Sponsor
Related Party Transaction [Line Items]
Shares transferred (in shares)	25,000	25,000

- Definition

"Number of shares of the company that are subject to forfeiture represented as a percentage of issued and outstanding stock as a result of partial exercise of over-allotment option. "

+ References

No definition available.

+ Details

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Namespace Prefix:	atmr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the maximum number of common stock shares subject to forfeiture.

+ References

No definition available.

+ Details

Name:	atmr_MaximumCommonStockSharesSubjectToForfeiture
Namespace Prefix:	atmr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of the company that were no longer subject to forfeiture.

+ References

No definition available.

+ Details

Name:	atmr_NumberOfSharesNoLongerSubjectToForfeiture
Namespace Prefix:	atmr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of shares transferred.

+ References

No definition available.

+ Details

Name:	atmr_SharesTransferred
Namespace Prefix:	atmr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The threshold period after the business combination in which the 20 trading days within any 30 trading day period commences for the transfer, assigning or sale of any shares of the company, after the completion of the initial business combination.

+ References

No definition available.

+ Details

Name:	atmr_ThresholdPeriodAfterBusinessCombinationInWhichSpecifiedTradingDaysWithinAnySpecifiedTradingDayPeriodCommences
Namespace Prefix:	atmr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The threshold period for not to transfer, assign or sell any of the shares or warrants, after the completion of the initial business combination.

+ References

No definition available.

+ Details

Name:	atmr_ThresholdPeriodForNotToTransferAssignOrSellAnySharesOrWarrantsAfterCompletionOfInitialBusinessCombination
Namespace Prefix:	atmr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of the entity's common stock which would be required to be attained to trigger the transfer, assign or sale of any shares or warrants of the company, after the completion of the initial business combination.

+ References

No definition available.

+ Details

Name:	atmr_TransferAssignOrSellAnySharesOrWarrantsAfterCompletionOfInitialBusinessCombinationStockPriceTrigger
Namespace Prefix:	atmr_
Data Type:	dtr-types:perShareItemType
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_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares (or other type of equity) forfeited during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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Data Type:	na
Balance Type:
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- Details

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- Details

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- Details

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Data Type:	na
Balance Type:
Period Type: