Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Summary of Total Purchase Consideration Transferred (Details) - Micropulse West [Member] $ in Thousands	Apr. 30, 2021 USD ($)
Business Acquisition [Line Items]
Cash	$ 12,452
Contingent consideration	1,295
Fair value of total consideration transferred	$ 13,747

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
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-URI https://asc.fasb.org/extlink&oid=126966197&loc=d3e6578-128477

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