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Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 23, 2021
Apr. 30, 2021
Business Acquisition [Line Items]    
Business combination acquisition costs expensed $ 19,010  
Micropulse West [Member]    
Business Acquisition [Line Items]    
Business acquisition, percentage of interests acquired   100.00%
Payment of transaction fee to affiliate   $ 130
Micropulse West [Member] | Other Expense [Member]    
Business Acquisition [Line Items]    
Business combination acquisition costs expensed   $ 869