Goodwill - Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Jul. 22, 2020
Goodwill [Line Items]
Goodwill	$ 98,333,000	$ 98,333,000
Disposal group, including discontinued operation, goodwill, noncurrent		18,623,000
Goodwill impairment	$ 0	$ 0
OpenNMS Assignment \| Equity Method Investee
Goodwill [Line Items]
Goodwill			$ 1,026,000

Amount classified as goodwill attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

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Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant