Discontinued Operations - PCT Segment Narrative (Details) - PCT Segment [Member] - Discontinued Operations [Member] - USD ($) $ in Thousands		1 Months Ended			3 Months Ended
	May 18, 2017	Jul. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Subsidiary, Ownership Interest by Parent	80.10%
Transaction Costs Related to Sale	$ 6,919
Payments to Employees	4,300
Retention Payments, First Retention Payment, Percent			50.00%		50.00%
Retention Payments, Second Retention Payment, Percent					50.00%
Hitachi Chemical Co., LTD [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
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	$ 4,400
Proceeds From Licensing Agreements, Escrow Amount	5,000
PCT Allendale, LLC [Member] | Hitachi Chemical Co., LTD [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase agreement, aggregate purchase price	$ 75,000