Consulting Hours Provided for Each Hour of Technical Support Given, Ratio

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

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Amount of transactions with related party during the financial reporting period.

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Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

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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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Related Party Transactions - Narrative (Details)		12 Months Ended
Related Party Transactions - Narrative (Details)	Jul. 31, 2015 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Nov. 29, 2016 USD ($)
Dow
Related Party Transaction [Line Items]
Payment amount for services		$ 1,819,000	$ 5,138,000	$ 8,361,000
Outstanding payable		0.0	1,200,000
Director \| Mutual services agreement
Related Party Transaction [Line Items]
Outstanding payable		0	0
Consulting fee, daily					$ 5,000
Consulting hours provided for each hour of technical support given, ratio					0.5
Expenses paid per service agreement		$ 0	$ 0
Dow \| Transition service agreement, set-up fee
Related Party Transaction [Line Items]
Payment amount for services	$ 5,000,000.0
Dow \| Import inventory costs
Related Party Transaction [Line Items]
Payment amount for services	$ 600,000