The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 30
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-Paragraph 2
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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.

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Acquired Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 859	$ 859	$ 563
Amortization expense, next rolling twelve months	540
Amortization expense, rolling year two	540
Amortization expense, rolling year three	498
Amortization expense, rolling year four	490
Amortization expense, rolling year five	$ 342
Customer lists \| Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	7 years
Customer lists \| Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	10 years
Patent
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	18 years
Purchased software \| Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	3 years
Purchased software \| Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	7 years
Trade Name
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	20 years
Other
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, useful life	15 years