Inventories and Significant Suppliers - Related Party Supplier (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Executive Vice President
Related Party Transactions [Line Items]
Ownership percentage in third party by executive	40.00%
Inventory Purchases \| Supplier Concentration Risk \| Affiliated Entity
Related Party Transactions [Line Items]
Inventory purchases form related party supplier	$ 1.1

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