Length of Contract for Royalty Payments from Revenue Generated in Asia

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Subsidiary, Ownership Interest by Parent

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- Definition

Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Name Accounting Standards Codification
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- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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Maximum number of units that may be acquired, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes.

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Collaboration and Hitachi License Agreement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 31, 2016	Mar. 11, 2016
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage			19.90%
Subsidiary, Ownership Interest by Parent			80.10%
Hitachi Chemical Co., LTD [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	19.90%		21.00%
Recorded Unconditional Purchase Obligation		$ 20.5	$ 19.4
Unrecorded Unconditional Purchase Obligation, Maximum Quantity			15.0
PCT Allendale, LLC [Member]
Business Acquisition [Line Items]
Contract Receivable			$ 5.6
PCT Allendale, LLC [Member]
Business Acquisition [Line Items]
Purchase Obligation			$ 4.4
Minimum [Member] \| PCT Allendale, LLC [Member]
Business Acquisition [Line Items]
Length of Contract for Royalty Payments from Revenue Generated in Asia	10 years