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.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation.

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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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Balance Sheet Information - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2021	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Payments to acquire property, plant, and equipment		$ 900	$ 1,900
Depreciation and amortization		2,393	2,645
Amortization of intangible assets		700	700
ValidSoft Note Receivable \| Subsequent Event
Property, Plant and Equipment [Line Items]
Proceeds from collection of notes receivable	$ 300
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and amortization		$ 1,700	$ 1,900
ValidSoft Ltd
Property, Plant and Equipment [Line Items]
Interest rate (as percent)		5.00%