Business Combination with Fathom OpCo - Summary of Intangible Assets Acquired in the Acquisition (Details) - Fathom OpCo [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 270,000
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 70,000
Provisional useful life	15 years
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 180,000
Provisional useful life	19 years
Developed Software [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 4,300
Provisional useful life	5 years
Developed Technology [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 15,700
Provisional useful life	5 years