Company Overview and Basis of Presentation - Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Related party expenses	$ 0.3	$ 0.1
Maximum \| Customer Concentration Risk \| Sales Revenue, Net
Related Party Transaction [Line Items]
Substantial stockholder revenue percentage	1.00%	1.00%
Substantial Stockholder
Related Party Transaction [Line Items]
Revenue	$ 0.4	$ 0.4

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Costs of sales and operating expenses for the period incurred from transactions with related parties.

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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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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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