Subsequent Events - Narrative (Detail) - Atlas Holdings LLC - Subsequent Event $ / shares in Units, $ in Billions	Nov. 03, 2021 USD ($) $ / shares
Subsequent Event [Line Items]
Business acquisition, transaction costs | $	$ 2.1
Business acquisition stockholders receive cash per share | $ / shares	$ 8.52
Business Acquisition, Equity Interest Issued or Issuable, Basis for Determining Value	Pursuant to the Merger Agreement, subject to the terms and conditions therein, Atlas will acquire all of the outstanding shares of the Company’s common stock, and the Company’s stockholders will receive $8.52 per share in cash for each share of Company common stock.