Other Assets - Investment in a Hardware Supplier (Details) - Hardware Supplier - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020	Jul. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Conversion of outstanding notes receivable	$ 5.6	$ 5.6	$ 5.6
Conversion of outstanding notes receivable (in shares)			9,520,832

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.

No definition available.

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration