Information Concerning Product Lines, Geographic Information and Revenue Concentration - Narrative (Details)	6 Months Ended
Jun. 30, 2019
Outside United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of long lived assets, including property and equipment and other assets	11.00%

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