Collaboration and Hitachi License Agreement - 2017 Hitachi Transaction (Details) - USD ($) $ in Thousands		1 Months Ended			3 Months Ended	12 Months Ended
	May 18, 2017	May 31, 2018	May 31, 2017	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2018
PCT Segment [Member] | Discontinued Operations [Member]
Business Acquisition [Line Items]
Ownership interest (percent)	80.10%
Transaction and retention costs	$ 6,919
Payments to Employees					$ 4,300
Payment for Retention Agreement in Connection with Sale, First Retention Payment, Percent					50.00%
Payment for Retention Agreement in Connection with Sale, Second Retention Payment, Percent					50.00%
Hitachi Chemical Co., LTD [Member] | PCT Segment [Member] | Discontinued Operations [Member]
Business Acquisition [Line Items]
Purchase agreement, aggregate purchase price	75,000
Purchase agreement, additional consideration	4,400
Purchase Agreement, Potential Future Milestone Payment	5,000
Cumulative Revenue Threshold for Receiving Milestone Payment	125,000
Proceeds From Licensing Agreements, Initial Payment				$ 5,000
Proceeds From Licensing Agreements, Closing Payments	65,000
Proceeds From Licensing Agreements, Escrow Amount	5,000
Hitachi Chemical Co., LTD [Member] | PCT Allendale, LLC [Member] | PCT Segment [Member] | Discontinued Operations [Member]
Business Acquisition [Line Items]
Purchase agreement, aggregate purchase price	$ 75,000
Director [Member] | Robert A. Preti [Member]
Business Acquisition [Line Items]
Related Party Transaction, Payment for Retention Agreement in Connection with Sale, First Retention Payment			$ 1,900
Related Party Transaction, Payment for Retention Agreement in Connection with Sale, Second Retention Payment		$ 1,900
Related Party Transaction, Payment for Retention Agreement in Connection with Sale, Third Retention Payment, Percentage of Milestone Payment						5.00%